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home / news releases / ODV - Osisko Development Intercepts 57.29 g/t Gold Over 3.05 Meters, 625.95 g/t Gold Over 0.5 Meters and 15.26 g/t Gold Over 4.4 Meters in Lowhee Infill Drilling at Cariboo Gold Project

ODV - Osisko Development Intercepts 57.29 g/t Gold Over 3.05 Meters, 625.95 g/t Gold Over 0.5 Meters and 15.26 g/t Gold Over 4.4 Meters in Lowhee Infill Drilling at Cariboo Gold Project

Osisko Development Corp.

MONTREAL, Sept. 08, 2025 (GLOBE NEWSWIRE) -- Osisko Development Corp. (NYSE: ODV, TSXV: ODV) (" Osisko Development " or the " Company ") is pleased to announce results from its infill and exploration diamond drill, and development sampling campaigns in the Lowhee Zone within the Company's permitted, 100%-owned Cariboo Gold Project (" Cariboo " or the " Project "), located in central British Columbia (" B.C. "), Canada. The program to date has consisted of approximately 6,471 meters (" m ") of underground infill drilling and approximately 398 m of chip and rock saw channel sampling.

Chris Lodder, President, stated , "The recent underground infill drilling at Lowhee Zone was conducted to analyze how grade holds up under tighter drilling and to investigate optimal drill hole spacing for future mining. We're highly encouraged that underground exploration drilling in the Lowhee Zone and across the deposit completed to date continues to indicate that veins remain open at depth, highlighting the strong potential for future resource expansion through additional exploration programs leveraging existing underground infrastructure. A comprehensive 13,000-meter infill drill program is already underway, designed to deliver important data for local resource modeling, mine planning, and optimization of production stope design. We anticipate providing regular progress updates on this program in the coming months."

DRILL ASSAY HIGHLIGHTS

This news release includes assays from sixty-eight (68) underground infill and exploration diamond drill (" DD ") holes totaling approximately 6,471 m completed from November 2024 through early August 2025 (see Table 1 ) and for which assays were received by a cut off date of August 16, 2025. Select fire and photon assay highlights include:

  • 625.95 grams per tonne ("g/t") gold ("Au") over 0.5 m in hole BMU-25-040
  • 57.29 g/t Au over 3.05 m in hole BMU-25-032, including:
    • 238.20 g/t Au over 0.5 m
    • 52.57 g/t Au over 0.6 m
      • 23.77 g/t Au over 1.0 m
  • 15.26 g/t Au over 4.4 m in hole BMU-25-004, including:
    • 83.40 g/t au over 0.5 m
    • 46.80 g/t Au over 0.5 m
  • 26.23 g/t Au over 2.4 m in hole BMU-25-025 including:
    • 55.96 g/t Au over 0.8 m
    • 29.45 g/t Au over 0.55 m
      • 3.39 g/t Au over 0.5 m
  • 55.74 g/t Au over 1.0 m in hole BMU-25-034, including:
    • 57.15 g/t Au over 0.5 m
      • 54.34 g/t Au over 0.5 m
  • 8.37 g/t Au over 5.9 m in hole BMU-25-014, including:
    • 50.24 g/t Au over 0.5 m
    • 15.97 g/t Au over 0.5 m
    • 10.02 g/t Au over 0.55 m
    • 6.88 g/t Au over 0.5 m
    • 6.41 g/t Au over 0.5 m
      • 5.74 g/t Au over 0.5 m
  • 7.06 g/t Au over 6.4 m in hole BMU-25-026, including:
    • 75.61 g/t Au over 0.5 m
      • 8.53 g/t Au over 0.5 m
  • 12.44 g/t Au over 3.45 m in hole BMU-25-017, including:
    • 79.17 g/t Au over 0.5 m
      • 4.93 g/t Au over 0.5 m
  • 7.23 g/t Au over 5.75 m in hole BMU-25-019, including:
    • 61.18 g/t Au over 0.5 m
    • 13.32 g/t Au over 0.5 m
      • 3.31 g/t Au over 0.5 m
  • 28.55 g/t Au over 1.45 m in hole BMU-25-045, including:
    • 80.20 g/t Au over 0.5 m

True widths are estimated to be between 50% and 90% of reported core length intervals. Intervals not recovered by drilling were assigned zero grade. Top cuts have not been applied to high grade assays. Complete assay highlights are presented in Table 1 and drill hole locations and orientations are listed in Table 3.

Figure 1: Cariboo Gold Project deposit map with Location of Lowhee Zone and Cow Portal underground access.


Figure 2: Lowhee Zone select underground drilling highlights.


INFILL AND EXPLORATION PROGRAM SUMMARY

  • 14 NQ (47.6-millimeter diameter) diamond drill holes (BMU-25-008 to 021) with depth ranging from 42 to 48 m focused on infilling a 25 m long section of planned ore drive.
  • 4 NQ diamond drill holes (BMU-25-001, 003, 004, 007) with an average depth of 290 m were drilled to explore zones adjacent to the existing Lowhee Zone mineral resources.
  • 22 NQ diamond drill holes (BMU-25-032 to 053) with an average depth of 90 m conducting systematic grid infill on a set of mineral reserve blocks, mineral inferred resources, and non-DSO resources.
  • 8 NQ diamond drill holes (BMU-24-001 to 008) with an average depth of 118 m were drilled infilling areas within existing mineral reserves and resources.

NEXT STEPS

  • A 13,000-meter systematic grid infill program is underway within the Lowhee Zone targeting mineral reserve blocks, inferred mineral resources, and non-DSO resources in an approximate 100 m swath transecting approximately the full width of the Lowhee Zone ( Figure 3 ). Drilling at 10 m centers from new development at the 1,260 elevation level, the program is expected to provide a comprehensive data set that will inform resource modeling, mine planning, production stope design procedures and parameters, and the appropriate grid spacing for future infill drilling. Additional systematic grid infill drill programs are planned in step with future underground development progress into other areas of the deposit.
  • Structural modelling suggests that the sandstone rock package, the primary host rock for the Cariboo deposit, remains open well beyond depths tested to date. Positive results from deeper drilling across the deposit highlight strong potential for extensions at depth, below the currently defined mineral reserves and resources ( Figure 4 ).

Figure 3: Location of the ongoing 13,000-meter infill drilling campaign.


Figure 4: Northeast facing long section of the Cow Mountain and Lowhee Zone deposit areas with select three-meter composite highlights illustrating exploration potential at depth and along strike to the southeast.


UNDERGROUND CHIP/CHANNEL SAMPLING HIGHLIGHTS

This news release contains assays from eighty-nine (89) underground face and wall rock chip and rock saw channels (" CH ") totaling approximately 398 m completed in ore and access development from October 2024 through July 2025 (see Table 2 ) and for which assays were received by a cut off date of July 31, 2025. Select fire and photon assay highlights include:

  • 22.01 g/t Au over 3.8 m in chip channel UGCH00189, including:
    • 104.37 g/t Au over 0.8 m
  • 12.23 g/t Au over 4.6 m in chip channel UGCH00183, including:
    • 69.95 g/t Au over 0.8 m
  • 6.25 g/t Au over 4.2 m in rock saw channel UGCH00236, including:
    • 12.64 g/t Au over 1.0 m
      • 13.62 g/t Au over 0.9 m
  • 5.81 g/t Au over 4.2 m in face chip channel UGCH00193, including:
    • 20.66 g/t Au over 1.1 m
  • 3.32 g/t Au over 6.5 m in face chip channel UGCH00213, including:
    • 13.52 g/t Au over 1.0 m
      • 7.77 g/t Au over 1.0 m
  • 4.82 g/t Au over 4.2 m in rock saw channel UGCH00246, including:
    • 25.22 g/t Au over 0.8 m
  • 4.22 g/t Au over 4.2 m in rock saw channel UGCH00245, including:
    • 7.51 g/t Au over 1.2 m
      • 4.86 g/t Au over 1.5 m
  • 3.61 g/t Au over 4.4 m in chip channel UGCH00176, including:
    • 22.20 g/t Au over 0.7 m
  • 3.02 g/t Au over 5.2 m in chip channel UGCH00210, including:
    • 9.87 g/t Au over 1.0 m
      • 3.13 g/t Au over 1.2 m
  • 4.14 g/t Au over 3.7 m in rock saw channel UGCH00243, including:
    • 7.65 g/t Au over 1.0 m
      • 6.07 g/t Au over 1.2 m

True widths are estimated to be between 85% and 100% of reported sample intervals for all face sampling in ore drives and wall sampling in crosscuts. Wall samples in ore drives (along the vein) are excluded from the above list and indicated as select (Table 4). Top cuts have not been applied to high grade assays. Complete assay highlights are presented in Table 2 and sample locations are listed in Table 4.

Figure 5: Lowhee Zone face and wall rock chip and rock saw channel samples with select assay highlights.


Table 1: Length weighted assay composites and individual samples>=3.0 g/t for Lowhee Zone underground diamond drillholes completed November 2024 – August 16, 2025.

Drillhole ID
From (m)
To (m)
Length (m)
Au (g/t)
BMU-24-001
77.8
78.3
0.5
6.28
83.4
85.25
1.85
9.64
Including
84.25
84.75
0.5
33.54
92.5
93
0.5
3.25
102
105
3
7.89
Including
103.9
104.5
0.6
25.93
and
104.5
105
0.5
15.25
BMU-24-002
92.2
92.9
0.7
5.09
98
98.5
0.5
22.89
BMU-24-003
83
83.5
0.5
36.82
BMU-24-004
92.9
98
5.1
3.60
Including
92.9
93.4
0.5
6.10
and
95.6
96.1
0.5
24.06
BMU-24-005
117
117.5
1
4.28
123.75
124.25
0.5
17.85
BMU-24-006
80.4
82
1.6
3.72
Including
81
82
1
5.39
BMU-24-007
15.6
17.5
1.9
4.04
Including
17
17.5
0.5
12.51
34.9
35.5
0.6
3.81
39.2
39.7
0.5
17.30
47.8
48.3
0.5
6.92
87
87.55
0.55
3.05
94.1
94.6
0.5
19.34
100.5
104.05
3.55
3.40
Including
100.5
101.4
0.9
7.53
and
102
102.5
0.5
3.16
and
103.4
104.05
0.65
3.94
106.9
107.7
0.8
3.70
111.45
113.2
1.75
12.18
Including
111.45
111.95
0.5
23.82
and
111.95
112.65
0.7
12.03
BMU-24-008
20.75
22
1.25
3.70
Including
20.75
21.25
0.5
8.48
53.5
55.25
1.75
3.76
Including
53.5
54.05
0.55
10.15
100.55
101.6
1.05
25.19
104.6
105.1
0.5
23.47
109.4
112.5
3.1
3.85
Including
109.9
110.5
0.6
6.62
and
112
112.5
0.5
12.14
118.8
119.4
0.6
5.59
BMU-25-001
130.5
133.65
3.15
7.29
Including
132.5
133.65
1.15
18.45
BMU-25-002
No significant assays
BMU-25-003
273
273.5
0.5
7.64
BMU-25-004
15
15.5
0.5
3.22
24.75
25.3
0.55
3.87
46.2
47.25
1.05
4.09
Including
46.75
47.25
0.5
7.89
64.75
67.45
2.7
5.51
Including
64.75
65.25
0.5
19.35
and
66.85
67.45
0.6
8.53
84.45
85.35
0.9
17.90
95.5
96.5
1
10.94
Including
96
96.5
0.5
21.10
116.5
120.2
3.7
8.00
Including
118
118.6
0.6
6.82
and
119.6
120.2
0.6
40.80
125.3
126
0.7
18.05
139.1
141.8
2.7
3.51
Including
139.6
140.15
0.55
3.44
and
141.25
141.8
0.55
11.85
144
148.4
4.4
15.26
Including
144
144.5
0.5
83.40
and
147.9
148.4
0.5
46.80
152.9
153.6
0.7
7.71
158.45
159
0.55
7.81
183.25
183.85
0.6
3.18
222.35
224
1.65
5.41
Including
222.35
223
0.65
12.40
BMU-25-005
Geotechnical hole; no significant assays
BMU-25-006
Geotechnical hole; not sampled
BMU-25-007
0.75
1.25
0.5
7.05
30
33.55
3.55
7.98
Including
30
30.5
0.5
6.28
and
31.8
32.35
0.55
42.50
76.2
76.7
0.5
4.50
90.55
93.3
2.75
3.40
Including
90.55
91.05
0.5
3.75
and
92.75
93.3
0.55
13.50
99.35
102.7
3.35
6.32
Including
99.35
99.9
0.55
12.60
and
99.9
100.5
0.6
10.55
and
102.2
102.7
0.5
15.75
106.85
110.1
3.25
5.08
Including
109.5
110.1
0.6
25.40
118.25
122.85
4.6
7.07
Including
118.25
118.8
0.55
33.50
and
122
122.85
0.85
15.90
129.65
130.15
0.5
9.55
144.55
145.05
0.5
3.06
188
188.5
0.5
4.58
243.45
243.95
0.5
57.60
BMU-25-008
0.85
1.95
1.1
10.09
Including
0.85
1.35
0.5
4.93
and
1.35
1.95
0.6
14.38
40.35
41.05
0.7
5.37
BMU-25-009
No significant assays
BMU-25-010a
Hole abandoned
BMU-25-010
1.25
1.75
0.5
9.95
20.35
21
0.65
4.77
26.85
27.4
0.55
8.04
36
37.2
1.2
3.99
Including
36
36.5
0.5
3.94
and
36.5
37.2
0.7
4.02
BMU-25-011
0.7
1.75
1.05
4.03
Including
0.7
1.25
0.55
3.65
and
1.25
1.75
0.5
4.46
19.75
20.25
0.5
3.71
BMU-25-012
0.7
1.25
0.55
8.27
24.3
25.45
1.15
16.11
Including
24.85
25.45
0.6
28.18
28.65
29.2
0.55
4.77
30.35
30.9
0.55
3.58
BMU-25-013
0.7
2.35
1.65
3.24
Including
0.7
1.3
0.6
4.77
19.25
19.75
0.5
3.40
22.5
23
0.5
40.00
27.5
33.5
6
3.24
Including
29.9
30.4
0.5
4.42
and
30.4
30.9
0.5
21.73
and
32.06
32.6
0.54
7.76
BMU-25-014
8.65
9.15
0.5
7.16
30.7
36.6
5.9
8.37
Including
30.7
31.2
0.5
5.74
and
31.2
31.75
0.55
10.02
and
31.75
32.25
0.5
50.24
and
33.35
33.85
0.5
15.97
and
35.1
35.6
0.5
6.88
and
36.1
36.6
0.5
6.41
BMU-25-015
22.75
24
1.25
18.10
Including
22.75
23.25
0.5
40.65
and
23.25
24
0.75
3.06
BMU-25-016
33.95
39
5.05
4.28
Including
35.5
36.25
0.75
14.55
and
36.25
36.8
0.55
8.05
and
38.3
39
0.7
5.35
BMU-25-017
22.35
24.35
2
8.93
Including
23.35
23.85
0.5
12.74
and
23.85
24.35
0.5
21.68
30
33.45
3.45
12.44
Including
30
30.5
0.5
4.93
and
32.95
33.45
0.5
79.17
35.4
35.9
0.5
3.75
BMU-25-018
8.5
9
0.5
11.87
27.35
32.65
5.3
3.07
Including
28.2
28.8
0.6
11.62
and
29.7
30.3
0.6
9.01
and
32.15
32.65
0.5
5.72
40.75
41.25
0.5
5.41
BMU-25-019
25.15
25.65
0.5
12.77
29.15
31
1.85
8.85
Including
29.95
30.45
0.5
28.45
33.85
39.6
5.75
7.23
Including
36.25
36.75
0.5
13.32
and
37.75
38.25
0.5
3.31
and
38.25
38.75
0.5
61.18
BMU-25-020
28.6
29.15
0.55
3.13
29.75
30.4
0.65
3.85
37.8
39
1.2
3.75
Including
37.8
38.45
0.65
4.51
42.4
43.7
1.3
5.18
Including
42.9
43.7
0.8
7.87
BMU-25-021
28
31.9
3.9
6.06
Including
29.3
30.2
0.9
4.09
and
30.2
30.85
0.65
23.06
BMU-25-022
37
41.5
4.5
4.36
Including
40.5
41.5
1
15.80
45.9
46.5
0.6
4.94
BMU-25-023
1.95
2.45
0.5
29.93
37.5
38
0.5
3.31
39
40
1
3.64
51.35
51.95
0.6
13.43
56.95
57.45
0.5
5.19
66.5
67.1
0.6
8.15
BMU-25-024
18.8
19.3
0.5
5.66
42.4
46.9
4.5
3.08
Including
42.4
42.9
0.5
6.98
and
45.7
46.4
0.7
11.57
51.4
52
0.6
9.35
BMU-25-025
1.5
2.5
1
5.78
Including
1.5
2
0.5
9.91
30.7
33.1
2.4
26.23
Including
30.7
31.2
0.5
3.39
and
31.2
32
0.8
55.96
and
32
32.55
0.55
29.45
43
43.5
0.5
11.24
51
53.1
2.1
3.70
Including
51
51.5
0.5
11.51
BMU-25-026
2.5
3
0.5
19.25
49.5
50.3
0.8
4.71
54.6
61
6.4
7.06
Including
57
57.5
0.5
75.61
and
58.65
59.15
0.5
8.53
74.9
75.4
0.5
7.47
BMU-25-027
28.8
29.3
0.5
14.30
54.5
56
1.5
4.08
Including
55.5
56
0.5
10.90
57.5
61.5
4
3.58
Including
57.5
58
0.5
8.96
and
58
58.5
0.5
5.14
and
59.5
60
0.5
6.21
and
60
60.5
0.5
5.71
64.3
66.5
2.2
8.78
Including
64.3
65
0.7
8.84
and
66
66.5
0.5
26.17
BMU-25-028
33.7
37.3
3.6
3.82
Including
34.2
34.8
0.6
5.87
and
35.3
35.8
0.5
14.71
42.85
44
1.15
5.32
48.5
49
0.5
3.03
50.15
50.65
0.5
3.02
BMU-25-029
0
0.6
0.6
24.17
59.5
60
0.5
4.83
63.8
64.5
0.7
10.05
75.3
75.8
0.5
8.33
BMU-25-030
30
31.5
1.5
3.01
61.7
62.2
0.5
3.23
72.5
75.5
3
4.45
Including
72.5
73
0.5
22.08
and
75
75.5
0.5
3.22
BMU-25-031
43.25
43.75
0.5
4.76
47.75
49.15
1.4
3.23
Including
47.75
48.6
0.85
4.86
54
54.5
0.5
8.88
60.85
61.35
0.5
14.66
71.9
72.4
0.5
4.35
BMU-25-032
28.5
29.2
0.7
4.69
38.1
39.6
1.5
8.72
Including
39.1
39.6
0.5
25.07
43.4
44.15
0.75
7.15
57.5
60.55
3.05
57.29
Including
57.5
58.5
1
23.77
and
58.5
59
0.5
238.20
and
59.95
60.55
0.6
52.57
79.95
81.35
1.4
23.38
BMU-25-033
26.65
27.15
0.5
3.48
34.1
37.35
3.25
6.17
Including
34.1
34.6
0.5
4.84
and
36.85
37.35
0.5
34.86
46.2
46.7
0.5
37.98
58.5
59.05
0.55
4.17
75.15
75.9
0.75
5.90
BMU-25-034
40.8
41.3
0.5
6.37
54
54.6
0.6
7.25
57.9
58.4
0.5
13.47
72.7
73.7
1
55.74
Including
72.7
73.2
0.5
57.15
and
73.2
73.7
0.5
54.34
82.15
82.65
0.5
4.05
92.5
93
0.5
3.50
BMU-25-035
23.7
24.2
0.5
9.12
46.15
48.6
2.45
5.05
Including
46.15
46.65
0.5
15.10
and
48.1
48.6
0.5
9.62
78
78.5
0.5
42.81
85
85.5
0.5
20.58
BMU-25-036
43.3
43.8
0.5
9.802
57.25
58.3
1.05
14.53
Including
57.25
57.75
0.5
29.728
BMU-25-037
22
22.5
0.5
11.07
42.1
42.6
0.5
12.29
63.95
64.5
0.55
8.35
68.5
70.1
1.6
3.09
Including
68.5
69
0.5
3.41
72.2
72.9
0.7
3.60
74.9
75.5
0.6
6.06
BMU-25-038
50.9
51.5
0.6
6.00
63.95
64.5
0.55
5.23
BMU-25-039
32.5
33
0.5
3.41
BMU-25-040
91.5
92
0.5
625.95
102.5
104.5
2
5.22
Including
104
104.5
0.5
18.43
BMU-25-041
31.7
32.7
1
15.07
Including
31.7
32.2
0.5
4.34
and
32.2
32.7
0.5
25.81
57.5
60
2.5
3.03
59.5
60
0.5
12.95
66.75
67.35
0.6
4.18
80.7
81.2
0.5
4.65
BMU-25-042
68
68.5
0.5
3.39
80.5
81.5
1
6.12
Including
80.5
81
0.5
10.34
84
84.81
0.81
4.63
BMU-25-043
53
56.8
3.8
3.49
Including
53
53.5
0.5
14.88
and
56.3
56.8
0.5
10.78
60
64.5
4.5
5.16
Including
60
60.5
0.5
8.43
and
62.5
63
0.5
5.82
and
64
64.5
0.5
30.78
BMU-25-044
21
21.5
0.5
14.66
37.4
37.9
0.5
35.37
43.25
43.75
0.5
5.23
50.15
50.65
0.5
19.18
BMU-25-045
19.5
23
3.5
4.76
Including
19.5
20
0.5
30.78
33.05
34.5
1.45
28.55
Including
34
34.5
0.5
80.20
38.35
38.85
0.5
3.58
41.5
42
0.5
5.88
52.5
56.3
3.8
8.73
Including
52.5
53
0.5
9.01
and
53
53.5
0.5
9.02
and
53.5
54
0.5
25.40
and
55.8
56.3
0.5
22.81
63.15
63.65
0.5
15.17
BMU-25-046
41.5
42
0.5
8.55
62.4
65
2.6
7.55
Including
62.4
63
0.6
31.90
75.4
75.9
0.5
33.43
79.5
82
2.5
8.28
Including
79.5
80.5
1
14.01
and
80.5
81.05
0.55
8.42
BMU-25-047
72.55
73.1
0.55
7.22
BMU-25-048
26
27.25
1.25
11.28
Including
26.75
27.25
0.5
27.38
68.55
69.15
0.6
11.12
99
99.5
0.5
12.18
BMU-25-049
22
23.5
1.5
3.16
Including
22.5
23
0.5
4.97
and
23
23.5
0.5
3.89
30.5
31.05
0.55
18.38
44.5
45
0.5
19.21
48.8
49.3
0.5
6.83
60.85
61.45
0.6
13.33
BMU-25-050
26.95
27.5
0.55
5.98
45.15
45.65
0.5
7.26
55
57.5
2.5
3.02
Including
55
55.5
0.5
3.69
and
56
56.5
0.5
9.77
and
61.4
62
0.6
6.50
66.5
67
0.5
3.84
80.2
81.2
1
13.60
80.7
81.2
0.5
24.28
BMU-25-051
43
43.5
1
4.90
49.8
52.5
2.70
3.99
Including
50.8
51.4
0.60
15.76
62.5
63
0.50
5.08
67.5
71.15
3.65
4.49
Including
67.5
68
0.50
24.81
and
70
70.5
0.50
3.44
BMU-25-052
53
53.5
0.50
46.93
BMU-25-053
3
4.5
1.50
4.12
51
53
2.00
3.28
Including
51
51.5
0.50
10.00
69
70
1.00
5.33
BMU-25-054
44.65
45.15
0.50
6.16
69.5
70
0.50
18.96
BMU-25-055
23.3
23.8
0.50
4.20
56.65
58.15
1.50
8.91
Including
56.65
57.15
0.50
11.60
and
57.65
58.15
0.50
14.91
BMU-25-056
45.7
50.25
4.55
3.51
Including
45.7
46.2
0.50
7.93
and
49.75
50.25
0.50
23.00
68.05
70
1.95
4.03
Including
68.05
68.55
0.50
11.74
and
69.5
70
0.50
3.82
80.5
81.45
0.95
7.48
BMU-25-057
103.5
105
1.50
4.45
BMU-25-058
15.5
16.6
1.10
4.87
Including
15.5
16.1
0.60
8.47
47
47.6
0.60
11.85
61.4
62
0.60
8.00
70.4
71.6
1.20
3.89
Including
70.9
71.6
0.70
6.38
BMU-25-059
14.3
15.3
1.00
5.72
Including
14.8
15.3
0.50
10.56
43.5
46.7
3.20
3.21
Including
43.5
44
0.50
9.23
and
45
45.5
0.50
9.54
68.1
68.6
0.50
3.51
76.8
78
1.20
20.28
Including
77.3
78
0.70
34.25
BMU-25-060
23.5
24
0.50
9.35
42.5
43
0.50
4.29
44.5
45
0.50
5.08
52.7
53.2
0.50
4.61
59.1
59.6
0.50
5.89
65.8
66.3
0.50
3.92


Table 2: Length weighted assay composites and individual samples>=3.0 g/t for Lowhee Zone underground wall and face chip and rock saw channel sampling completed October 2024 – July 31, 2025.

Channel ID
From (m)
To (m)
Length (m)
Au (g/t)
UGCH00168
0.0
4.4
4.4
0.05
UGCH00169
0.0
4.2
4.2
0.09
UGCH00170
0.0
4.9
4.9
0.97
Including
3.0
3.7
0.7
6.39
UGCH00171
0.0
4.3
4.3
0.02
UGCH00172
0.0
3.6
3.6
0.06
UGCH00173
0.0
4.1
4.1
0.14
UGCH00174
0.0
3.8
3.8
0.05
UGCH00175
0.0
4.5
4.5
0.09
UGCH00176
0.0
4.4
4.4
3.61
Including
0.0
0.7
0.7
22.20
UGCH00177
0.0
3.2
3.2
2.38
Including
1.0
1.5
0.5
13.98
UGCH00178
0.0
4.2
4.2
2.97
Including
1.0
2.0
1.0
11.55
UGCH00179
0.0
4.0
4.0
0.21
UGCH00180
0.0
4.2
4.2
0.04
UGCH00181
No significant assays
UGCH00182
0.0
4.4
4.4
1.02
Including
0.0
0.3
0.3
13.85
UGCH00183
0.0
4.6
4.6
12.23
Including
0.0
0.8
0.8
69.95
UGCH00184
0.0
3.8
3.8
0.10
UGCH00185
0.0
4.0
4.0
0.33
UGCH00186
0.0
4.2
4.2
0.07
UGCH00187
0.0
5.2
5.2
0.51
UGCH00188
0.0
3.6
3.6
0.99
Including
0.0
1.0
1.0
3.49
UGCH00189
0.0
3.8
3.8
22.01
Including
0.8
1.6
0.8
104.37
UGCH00190
0.0
3.3
3.3
0.05
UGCH00191
0.0
3.9
3.9
1.80
Including
3.0
3.9
0.9
7.76
UGCH00192
0.0
4.5
4.5
3.30
1.4
2.4
1.0
14.59
UGCH00193
0.0
4.2
4.2
5.81
Including
2.2
3.3
1.1
20.66
UGCH00194
0.0
4.0
4.0
0.29
UGCH00195
0.0
4.0
4.0
1.10
Including
0.0
1.2
1.2
3.23
UGCH00196
0.0
4.0
4.0
0.81
Including
0.0
1.0
1.0
3.22
UGCH00197
0.0
4.3
4.3
0.05
UGCH00198
0.0
4.5
4.5
0.02
UGCH00199
0.0
3.8
3.8
0.01
UGCH00200
0.0
3.9
3.9
0.27
UGCH00201
0.0
3.7
3.7
0.02
UGCH00202
0.0
3.0
3.0
0.01
UGCH00203
0.0
3.8
3.8
0.02
UGCH00204
0.0
3.8
3.8
0.03
UGCH00205
0.0
2.8
2.8
0.66
UGCH00206
0.0
2.7
2.7
0.88
UGCH00207
0.0
5.6
5.6
0.02
UGCH00208
0.0
5.8
5.8
0.03
UGCH00209
0.0
6.0
6.0
0.18
UGCH00210
0.0
5.2
5.2
3.02
Including
0.0
1.0
1.0
9.87
and
4.0
5.2
1.2
3.13
UGCH00211
0.0
5.5
5.5
0.06
UGCH00212
0.0
5.9
5.9
0.13
UGCH00213
0.0
6.5
6.5
3.32
Including
0.0
1.0
1.0
13.52
and
5.5
6.5
1.0
7.77
UGCH00214
No significant assays
UGCH00215
No significant assays
UGCH00216
No significant assays
UGCH00217
No significant assays
UGCH00218
0.0
0.1
0.1
22.95
Including
0.0
0.1
0.1
22.95
UGCH00219
0.0
4.5
4.5
3.09
Including
3.3
4.0
0.8
16.06
UGCH00220
0.0
4.2
4.2
2.37
Including
0.5
1.0
0.5
17.45
UGCH00221
No significant assays
0.0
10.0
10.0
0.23
UGCH00222
No significant assays
0.0
9.7
9.7
0.33
UGCH00223
No significant assays
6.0
7.0
1.0
10.64
UGCH00224
No significant assays
0.0
20.0
20.0
0.13
UGCH00225
No significant assays
0.0
7.0
7.0
0.06
UGCH00226
1.0
2.0
1.0
11.12
12.0
13.0
1.0
9.69
UGCH00227
0.0
4.6
4.6
0.01
UGCH00228
0.0
6.4
6.4
0.41
UGCH00229
0.0
5.5
5.5
0.01
UGCH00230
0.0
4.2
4.2
0.96
Including
1.9
2.4
0.5
7.36
UGCH00231
0.0
3.9
3.9
0.17
UGCH00232
0.0
4.5
4.5
0.50
UGCH00233
0.0
2.7
2.7
1.77
Including
1.4
1.9
0.5
9.45
UGCH00234
0.0
4.0
4.0
0.81
UGCH00235
0.0
3.0
3.0
0.01
UGCH00236
0.0
4.2
4.2
6.25
Including
1.7
2.7
1.0
12.64
and
2.7
3.6
0.9
13.62
UGCH00237
0.0
3.4
3.4
0.64
Including
2.8
3.4
0.6
3.49
UGCH00238
0.0
4.2
4.2
3.38
Including
3.5
4.2
0.7
12.42
UGCH00239
0.0
4.0
4.0
3.47
Including
1.5
2.5
1.0
8.65
and
3.2
4.0
0.8
6.28
UGCH00240
0.0
4.7
4.7
1.24
Including
3.5
4.7
1.2
3.26
UGCH00241
0.0
2.5
2.5
5.36
Including
0.0
1.0
1.0
10.15
and
1.0
2.0
1.0
3.17
UGCH00242
0.0
4.5
4.5
1.15
Including
3.5
4.5
1.0
3.19
UGCH00243
0.0
3.7
3.7
4.14
Including
0.0
1.0
1.0
7.65
and
2.5
3.7
1.2
6.07
UGCH00244
0.0
4.3
4.3
1.09
UGCH00245
0.0
4.2
4.2
4.22
Including
1.5
2.7
1.2
7.51
and
2.7
4.2
1.5
4.86
UGCH00246
0.0
4.4
4.4
4.82
Including
0.0
0.8
0.8
25.22
UGCH00247
0.0
4.1
4.1
0.86
Including
0.0
0.5
0.5
5.29
UGCH00248
0.0
0.5
0.5
10.46
UGCH00249
0.0
0.9
0.9
7.58
UGCH00250
0.0
0.9
0.9
4.92
UGCH00251
0.0
0.5
0.5
3.01
UGCH00252
0.0
1.2
1.2
16.35
UGCH00253
0.0
1.0
1.0
4.22
UGCH00254
0.0
1.5
1.5
8.70
UGCH00255
0.0
0.5
0.5
24.64
UGCH00256
0.0
0.5
0.5
8.45


Table 3: Underground diamond drillhole collar locations, drillhole orientations, and max depths. Negative dips point down.

Drillhole ID
Mine Location
Northing
(UTM z12N)
Easting
(UTM z12N)
Elevation (m)
Dip
Azimuth
Depth (m)
Prospect
Program Type
BMU-24-001
L1260-MA
596598.8
5882916.5
1267.6
1.0
273
110.5
LZ
Infill
BMU-24-002
L1260-MA
596599.1
5882916.2
1267.6
2.0
266
120.0
LZ
Infill
BMU-24-003
L1260-MA
596598.9
5882916.6
1267.9
10.0
277.5
117.0
LZ
Infill
BMU-24-004
L1260-MA
596599.0
5882916.4
1267.9
8.5
267.17
110.5
LZ
Infill
BMU-24-005
L1260-MA
596599.3
5882915.9
1267.7
3.0
263
147.0
LZ
Infill
BMU-24-006
L1260-MA
596599.3
5882915.7
1267.8
5.5
258.5
105.0
LZ
Infill
BMU-24-007
L1290-ORE
596492.0
5882885.1
1290.2
-8.0
142
141.0
LZ
Infill
BMU-24-008
L1290-ORE
596491.8
5882884.9
1289.9
-16.0
140
140.0
LZ
Infill
BMU-25-001
L1290-RMK
596532.3
5883011.8
1282.1
-4.0
279.5
333.0
CM
Exploration
BMU-25-002
L1290-RMK
596533.3
5883011.0
1282.5
-17.0
259.0
145.7
LZ
Infill
BMU-25-003
L1290-RMK
596534.2
5883013.2
1282.4
-1.0
320.0
303.0
CM
Exploration
BMU-25-004
L1290-RMK
596492.1
5882885.7
1289.1
-41.0
118.0
250.0
LZ
Exploration
BMU-25-005
C1300
596436.4
5883381.1
1283.8
40.0
320.0
48.0
LZ
Geotechnical
BMU-25-006
C1300
596436.5
5883381.1
1282.8
7.0
320.0
75.0
LZ
Geotechnical
BMU-25-007
L1260-SMP
596529.0
5882824.1
1256.7
3.0
135.0
275.0
LZ
Infill / Exploration
BMU-25-008
L1260-SMP
596529.6
5882824.8
1256.5
-1.0
108.0
45.0
LZ
Infill
BMU-25-009
L1260-SMP
596529.6
5882824.9
1256.8
5.5
108.0
45.0
LZ
Infill
BMU-25-010
L1260-SMP
596529.6
5882824.8
1256.6
-1.0
114.5
42.0
LZ
Infill
BMU-25-010a
L1260-SMP
596529.4
5882824.6
1256.6
-1.0
114.5
6.0
LZ
Infill
BMU-25-011
L1260-SMP
596529.5
5882824.8
1256.7
5.5
114.5
42.0
LZ
Infill
BMU-25-012
L1260-SMP
596529.5
5882824.6
1256.4
-0.5
121.0
42.0
LZ
Infill
BMU-25-013
L1260-SMP
596529.3
5882824.7
1256.7
6.0
121.0
42.0
LZ
Infill
BMU-25-014
L1260-SMP
596529.3
5882824.5
1256.5
-0.5
127.5
48.0
LZ
Infill
BMU-25-015
L1260-SMP
596529.4
5882824.7
1256.7
6.0
127.5
42.0
LZ
Infill
BMU-25-016
L1260-SMP
596529.3
5882824.3
1256.5
-0.5
134.0
42.0
LZ
Infill
BMU-25-017
L1260-SMP
596529.3
5882824.4
1256.8
6.0
134.0
42.0
LZ
Infill
BMU-25-018
L1260-SMP
596529.1
5882824.1
1256.4
-0.5
140.0
45.0
LZ
Infill
BMU-25-019
L1260-SMP
596529.0
5882824.1
1256.7
6.0
140.0
42.0
LZ
Infill
BMU-25-020
L1260-SMP
596528.9
5882823.9
1256.5
-0.5
146.0
45.0
LZ
Infill
BMU-25-021
L1260-SMP
596528.8
5882824.0
1256.7
6.0
146.0
45.0
LZ
Infill
BMU-25-022
L1260-SMP
596528.9
5882823.9
1255.9
-17.5
146.0
72.0
LZ
Infill
BMU-25-023
L1260-SMP
596528.4
5882824.1
1256.2
-15.0
159.0
81.0
LZ
Infill
BMU-25-024
L1260-SMP
596528.9
5882824.1
1256.4
-1.0
159.0
78.4
LZ
Infill
BMU-25-025
L1260-SMP
596528.7
5882824.1
1257.1
18.0
159.0
78.0
LZ
Infill
BMU-25-026
L1260-SMP
596528.5
5882823.6
1256.1
-12.0
166.0
87.0
LZ
Infill
BMU-25-027
L1260-SMP
596528.4
5882823.8
1256.5
1.5
166.0
87.0
LZ
Infill
BMU-25-028
L1260-SMP
596528.4
5882823.8
1257.1
15.0
166.0
87.0
LZ
Infill
BMU-25-029
L1260-SMP
596528.1
5882823.8
1257.0
12.5
175.0
98.0
LZ
Infill
BMU-25-030
L1260-SMP
596528.2
5882823.6
1256.5
1.5
175.0
95.0
LZ
Infill
BMU-25-031
L1260-SMP
596528.2
5882823.6
1256.1
-10.0
175.0
95.0
LZ
Infill
BMU-25-032
L1290-ORE
596489.2
5882888.8
1289.6
20.0
245.0
120.0
LZ
Infill
BMU-25-033
L1290-ORE
596488.1
5882888.3
1290.0
14.0
245.0
106.0
LZ
Infill
BMU-25-034
L1290-ORE
596488.9
5882888.7
1289.9
7.0
245.0
96.0
LZ
Infill
BMU-25-035
L1290-ORE
596488.7
5882888.6
1290.0
-1.0
245.0
90.0
LZ
Infill
BMU-25-036
L1290-ORE
596488.6
5882888.5
1290.1
-11.0
245.0
81.0
LZ
Infill
BMU-25-037
L1290-ORE
596488.3
5882888.4
1290.1
-20.0
245.0
84.0
LZ
Infill
BMU-25-038
L1290-ORE
596488.6
5882888.5
1290.3
-30.0
245.0
87.0
LZ
Infill
BMU-25-039
L1290-ORE
596488.6
5882888.5
1290.5
-45.0
245.0
87.0
LZ
Infill
BMU-25-040
L1290-ORE
596488.6
5882888.5
1289.8
23.0
250.0
118.5
LZ
Infill
BMU-25-041
L1290-ORE
596489.0
5882888.6
1289.8
16.0
250.0
99.5
LZ
Infill
BMU-25-042
L1290-ORE
596489.0
5882888.6
1290.0
8.0
250.0
84.8
LZ
Infill
BMU-25-043
L1290-ORE
596488.1
5882888.3
1290.0
-1.0
250.0
78.0
LZ
Infill
BMU-25-044
L1290-ORE
596488.1
5882888.3
1290.0
-14.0
250.0
79.5
LZ
Infill
BMU-25-045
L1290-ORE
596488.1
5882888.3
1290.0
-25.5
250.0
79.5
LZ
Infill
BMU-25-046
L1290-ORE
596488.1
5882888.3
1290.0
-36.0
250.0
82.0
LZ
Infill
BMU-25-047
L1290-ORE
596488.4
5882888.4
1290.3
-47.0
250.0
90.0
LZ
Infill
BMU-25-048
L1290-ORE
596488.6
5882888.4
1289.8
24.5
256.0
108.0
LZ
Infill
BMU-25-049
L1290-ORE
596488.3
5882888.4
1289.9
16.0
256.0
93.0
LZ
Infill
BMU-25-050
L1290-ORE
596488.1
5882888.3
1290.0
7
256.0
93.0
LZ
Infill
BMU-25-051
L1290-ORE
596488.1
5882888.2
1290.0
-3
256.0
76.5
LZ
Infill
BMU-25-052
L1290-ORE
596488.1
5882888.3
1290.0
-18.5
256.0
76.5
LZ
Infill
BMU-25-053
L1290-ORE
596488.3
5882888.3
1290.0
-29
256.0
87.0
LZ
Infill
BMU-25-054
L1290-ORE
596488.0
5882888.3
1289.1
-40.0
256.0
84.0
LZ
Infill
BMU-25-055
L1290-ORE
596488.4
5882888.6
1291.1
28.0
265.0
104.5
LZ
Infill
BMU-25-056
L1290-ORE
596488.0
5882888.5
1290.1
-2.0
265.0
82.5
LZ
Infill
BMU-25-057
L1290-ORE
596488.6
5882888.8
1291.5
31.0
280.0
115.7
LZ
Infill
BMU-25-058
L1290-ORE
596488.1
5882888.8
1290.6
16.0
280.0
103.5
LZ
Infill
BMU-25-059
L1290-ORE
596488.3
5882888.9
1290.1
-3.0
280.0
84.0
LZ
Infill
BMU-25-060
L1290-ORE
596488.3
5882888.9
1289.7
-20.0
280.0
81.0
LZ
Infill


Table 4: Lowhee Zone – Underground locations of wall and face chip and rock saw channel samples.

Channel ID
Mine Location
Easting
(UTM Z 12N)
Northing
(UTM Z 12N)
Elevation (m)
Length (m)
Azimuth
Year Sampled
Type
UGCH00168
1290-ORE-000
596526.5
5882944.2
1288.21
4.4
303
2024
Face Chip
UGCH00169
1290-ORE-000
596524.2
5882940.1
1288.86
4.2
303
2024
Face Chip
UGCH00170
1290-ORE-000
596520.7
5882934.5
1288.506
4.9
303
2024
Face Chip
UGCH00171
1290-ORE-000
596518.6
5882931.6
1288.991
4.3
303
2024
Face Chip
UGCH00172
1290-ORE-000
596516.7
5882928.7
1288.9
3.6
301
2024
Face Chip
UGCH00173
1290-ORE-000
596515.6
5882926.2
1288.91
4.1
301
2024
Face Chip
UGCH00174
1290-ORE-000
596513.7
5882922.1
1288.895
3.8
301
2024
Face Chip
UGCH00175
1290-ORE-000
596512.3
5882919.0
1289.167
4.5
301
2024
Face Chip
UGCH00176
1290-ORE-000
596510.7
5882914.2
1289.37
4.4
295
2024
Face Chip
UGCH00177
1290-ORE-000
596511.7
5882917.3
1289.4
3.2
206
2024
Wall Chip Select
UGCH00178
1290-ORE-000
596509.1
5882912.2
1288.767
4.2
292
2024
Face Chip
UGCH00179
1290-ORE-000
596506.5
5882908.5
1289.067
4
302
2024
Face Chip
UGCH00180
1290-ORE-000
596504.9
5882905.1
1289.713
4.2
300
2024
Face Chip
UGCH00181
1290-ORE-000
596505.5
5882906.7
1289.694
1.7
209
2024
Wall Chip
UGCH00182
1290-ORE-000
596503.0
5882902.0
1289.197
4.4
298
2024
Face Chip
UGCH00183
1290-ORE-000
596501.0
5882898.4
1289.6
4.6
300
2024
Face Chip
UGCH00184
1290-ORE-000
596498.3
5882895.3
1290.54
3.8
304
2024
Face Chip
UGCH00185
1290-ORE-000
596496.4
5882892.6
1290.4
4
303
2024
Face Chip
UGCH00186
1290-ORE-000
596495.2
5882890.5
1290.5
4.2
295
2024
Face Chip
UGCH00187
1260-ORE-000
596491.4
5882884.6
1291
5.2
295
2024
Face Chip
UGCH00188
1260-ORE-000
596522.8
5882930.9
1259.3
3.6
292
2024
Face Chip
UGCH00189
1260-ORE-000
596521.8
5882928.0
1259.83
3.8
292.55
2024
Face Chip
UGCH00190
1260-ORE-000
596520.5
5882924.9
1259.66
3.4
292
2024
Face Chip
UGCH00191
1260-ORE-000
596520.4
5882921.3
1259.31
3.9
290
2024
Face Chip
UGCH00192
1260-ORE-000
596518.1
5882914.0
1260.07
4.5
290
2024
Face Chip
UGCH00193
1260-ORE-000
596515.8
5882910.8
1260
4.2
301
2024
Face Chip
UGCH00194
1260-ORE-000
596513.3
5882908.2
1259.81
4
302.5
2024
Face Chip
UGCH00195
1260-ORE-000
596510.9
5882905.5
1260.02
4
305.5
2024
Face Chip
UGCH00196
1260-ORE-000
596508.6
5882903.1
1259.93
4
305.5
2024
Face Chip
UGCH00197
1260-ORE-000
596507.1
5882900.7
1259.9
4.3
309.5
2024
Face Chip
UGCH00198
1260-ORE-000
596504.7
5882897.9
1259.97
4.5
306.2
2024
Face Chip
UGCH00199
1260-ORE-000
596502.4
5882895.1
1260.02
3.8
304.8
2024
Face Chip
UGCH00200
1260-ORE-000
596500.0
5882892.0
1260.3
3.9
310
2024
Face Chip
UGCH00201
1260-ORE-000
596528.1
5882941.6
1259.09
4.7
295
2024
Face Chip
UGCH00202
1260-ORE-SLASH-000
596523.6
5882934.5
1288.7
3
275
2024
Face Chip
UGCH00203
1260-ORE-SLASH-000
596522.3
5882931.8
1288.75
3.8
275
2024
Face Chip
UGCH00204
1260-ORE-SLASH-000
596520.8
5882928.0
1289.9
3.8
282
2024
Face Chip
UGCH00205
1260-ORE-SLASH-000
596517.9
5882924.9
1289.83
2.8
280
2024
Face Chip
UGCH00206
1260-ORE-SLASH-000
596516.6
5882921.7
1289.8
2.7
270
2024
Face Chip
UGCH00207
1260-ACC-001
596546.2
5882868.0
1259.705
5.6
300
2024
Face Chip
UGCH00208
1260-ACC-001
596543.0
5882862.4
1259.114
5.8
300
2024
Face Chip
UGCH00209
1260-ACC-001
596541.9
5882860.5
1258.492
6
300
2024
Face Chip
UGCH00210
1260-ACC-001
596539.5
5882856.7
1259.258
5.2
301
2024
Face Chip
UGCH00211
1260-ACC-001
596535.9
5882851.1
1257.247
5.5
301
2024
Face Chip
UGCH00212
1260-ACC-001
596532.6
5882845.7
1256.52
5.9
301
2024
Face Chip
UGCH00213
1260-ACC-001
596529.4
5882837.7
1256.4
6.5
298
2025
Face Chip
UGCH00214
1260-WHL-000
596523.9
5882840.6
1257.4
4
130
2025
Wall Chip
UGCH00215
1260-EHL
596527.4
5882838.5
1256.8
2.5
105
2025
Wall Chip
UGCH00216
1260-EHL
596529.3
5882837.3
1256.8
8
125
2025
Wall Chip
UGCH00217
1260-EHL
596536.4
5882833.4
1256.7
1.5
130
2025
Wall Chip
UGCH00218
1260-MA
596530.0
5882854.0
1257.6
0.1
0
2025
Select
UGCH00219
1260-SMP
596530.7
5882826.0
1256.06
4.5
300
2025
Face Chip
UGCH00220
1260-SMP
596528.9
5882823.0
1256
4.2
300
2025
Face Chip
UGCH00221
1260-WHL
596523.5
5882840.8
1256.77
10
301.7
2025
Wall Chip
UGCH00222
1260-WHL
596526.0
5882844.8
1256
9.7
300
2025
Wall Chip
UGCH00223
1260-EHL
596531.0
5882842.7
1256.5
10
126
2025
Wall Chip
UGCH00224
1260-EHL
596539.0
5882836.8
1256
20
120
2025
Wall Chip
UGCH00225
1260-EHL
596555.7
5882828.0
1256
7
120
2025
Wall Chip
UGCH00226
1260-EHL
596535.0
5882834.0
1256
28.5
120
2025
Wall Chip
UGCH00227
1260-WHL
596511.8
5882847.8
1256.4
4.6
15
2025
Face Chip
UGCH00228
1260-ORE-002
596565.4
5882814.4
1256.548
6.4
303
2025
Face Rock Saw Channel
UGCH00229
1260-ORE-002
596565.3
5882814.4
1259.451
5.5
304
2025
Face Rock Saw Channel
UGCH00230
1260-ORE-002
596563.4
5882813.2
1256.887
4.2
303
2025
Face Rock Saw Channel
UGCH00231
1260-ORE-002
596563.5
5882813.2
1258.944
3.85
303
2025
Face Rock Saw Channel
UGCH00232
1260-ORE-002
596562.9
5882811.0
1257.052
4.5
303
2025
Face Rock Saw Channel
UGCH00233
1260-ORE-002
596562.2
5882811.4
1260.157
2.7
303
2025
Face Rock Saw Channel
UGCH00234
1260-ORE-002
596562.1
5882809.1
1257.09
4
303
2025
Face Rock Saw Channel
UGCH00235
1260-ORE-002
596561.7
5882809.3
1259.264
3
303
2025
Face Rock Saw Channel
UGCH00236
1260-ORE-002
596561.3
5882807.1
1257.368
4.2
303
2025
Face Rock Saw Channel
UGCH00237
1260-ORE-002
596561.3
5882807.1
1260.791
3.4
303
2025
Face Rock Saw Channel
UGCH00238
1260-ORE-002
596560.2
5882805.3
1257.465
4.2
302
2025
Face Rock Saw Channel
UGCH00239
1260-ORE-002
596560.2
5882805.3
1259.582
4
302
2025
Face Rock Saw Channel
UGCH00240
1260-ORE-002
596559.3
5882803.9
1257.756
4.7
303
2025
Face Rock Saw Channel
UGCH00241
1260-ORE-002
596558.3
5882804.4
1259.289
2.5
303
2025
Face Rock Saw Channel
UGCH00242
1260-ORE-002
596558.4
5882802.4
1257.791
4.5
303
2025
Face Rock Saw Channel
UGCH00243
1260-ORE-002
596558.1
5882802.5
1259.857
3.7
303
2025
Face Rock Saw Channel
UGCH00244
1260-ORE-002
596557.0
5882800.8
1257.615
4.3
303
2025
Face Rock Saw Channel
UGCH00245
1260-ORE-002
596557.1
5882800.7
1259.698
4.2
303
2025
Face Rock Saw Channel
UGCH00246
1260-ORE-002
596556.0
5882799.1
1257.685
4.4
302
2025
Face Rock Saw Channel
UGCH00247
1260-ORE-002
596556.0
5882799.1
1259.696
4.1
302
2025
Face Rock Saw Channel
UGCH00248
1260-ORE-002
596558.4
5882810.4
1257.9
0.5
210
2025
Channel Select
UGCH00249
1260-ORE-002
596557.8
5882809.5
1258
0.9
210
2025
Channel Select
UGCH00250
1260-ORE-002
596557.2
5882808.4
1258.2
0.9
210
2025
Channel Select
UGCH00251
1260-ORE-002
596556.8
5882807.7
1258.5
0.5
210
2025
Channel Select
UGCH00252
1260-ORE-002
596556.0
5882806.0
1258.18
1.2
210
2025
Channel Select
UGCH00253
1260-ORE-002
596555.7
5882806.0
1257.83
1
210
2025
Channel Select
UGCH00254
1260-ORE-002
596554.4
5882803.9
1257.88
1.5
210
2025
Channel Select
UGCH00255
1260-ORE-002
596563.5
5882812.2
1256.71
0.5
210
2025
Channel Select
UGCH00256
1260-ORE-002
596563.6
5882812.3
1257.4
0.5
210
2025
Channel Select


ABOUT LOWHEE ZONE

Geological mapping and geochemical sampling were carried out on Barkerville Mountain from 2017-2018, with the Lowhee Zone identified as a high-priority drill target.

In 2019, two southeast-oriented stratigraphic and 22 northwest-southeast oriented drillholes (8,337.0 m) were drilled at the Lowhee Zone. The drilling successfully identified auriferous quartz-carbonate veins at similar orientations to those observed elsewhere on the Cariboo Gold project. Initial 3D geological modelling and resource estimation commenced, and further drilling was recommended.

In 2020, 24 northwest-oriented diamond drillholes (10,144.5 m) were drilled. The focus of the exploration program was to test the extent of mineralization along the down-dip and northeast strike-extent of veining. An internal resource estimation of the Lowhee deposit was completed. Further drilling was recommended to grow the confidence of the resource.

In 2021, a total of 94 diamond drillholes (29,449.1 m) were drilled. The focus of drilling was to delineate, and infill modelled veins with 25 m spacing. BGM’s resource modelling team produced a mineral resource estimate, and the collection of a bulk sample was recommended.

In 2022, a total of 27 diamond drillholes (6,563.90 m) were drilled. There were two main goals with this drill program. The first goal was to infill a potential bulk sample location achieving category conversion from indicated (25 m spacing) to measured (12.5 m spacing). The second goal was to continue to delineate and infill modelled veins with 25 m spacing.

Lowhee Zone access is through Cow portal on the northwestern flank of Barkerville Mountain ( Figure 1 and Figure 3 ) Cow portal construction was completed in Q4 2024 and development of the underground ramp into the Lowhee zone commenced in Q1 2025. Approximately 350 m of development has been advanced within the Lowhee Zone deposit at the 1,290 and 1,260-elevation levels since completion of the main access ramp. The probable mineral reserves estimate for the Lowhee Zone includes 104,491 ounces of contained Au (923,162 tonnes grading 3.52 g/t Au) and represents approximately 5% of the total contained gold in the estimated probable mineral reserves for the Cariboo Gold Project.

ABOUT CARIBOO GOLD PROJECT

The Cariboo Gold Project is a permitted, 100%-owned feasibility-stage project located in the historic Wells-Barkerville mining camp of central British Columbia, Canada. Spanning approximately 186,740 hectares, the Company’s land package includes 443 mineral titles and covers an approximate 77-kilometre strike of highly prospective exploration targets extending northwest to southeast. In late 2024, the Project was granted the Mines Act and Environmental Management Act (British Columbia) permits, marking the successful completion of the permitting process for key approvals, solidifying the Project's shovel-ready status.

The Cariboo Gold Project hosts probable mineral reserves of 2.07 million ounces of contained Au (17,815 kt grading 3.62 g/t Au); measured mineral resources of 8,000 ounces of contained Au (47 kt grading 5.06 g/t Au); indicated mineral resources of 1.60 million ounces of contained Au (17,332 kt grading 2.88 g/t Au); and inferred mineral resources of 1.86 million ounces of contained Au (18,774 kt grading 3.09 g/t Au). Mineral resources are reported exclusive of mineral reserves.

Technical Reports

Information relating to the Cariboo Gold Project and the 2025 FS on the Cariboo Gold Project is supported by the technical report, titled " NI 43-101 Technical Report, Feasibility Study for the Cariboo Gold Project, District of Wells, British Columbia, Canada " and dated June 11, 2025 (with an effective date of April 25, 2025) (the " Cariboo Technical Report ").

For readers to fully understand the information in the Cariboo Technical Report, reference should be made to the full text of the Cariboo Technical Report, including all assumptions, parameters, qualifications, limitations and methods therein. The Cariboo Technical Report is intended to be read as in its entirety, and sections should not be read or relied upon out of context. The Cariboo Technical Report was prepared in accordance with NI 43-101 and is available electronically on SEDAR+ ( www.sedarplus.ca ) and on EDGAR ( www.sec.gov ) under Osisko Development's issuer profile and on the Company's website at www.osiskodev.com .

Qualified Persons

The scientific and technical information contained in this news release has been reviewed and approved by Eryn Doyle, P. Geo., Senior Exploration Manager of Osisko Development, a "qualified person" within the meaning of National Instrument 43-101 – Standards of Disclosure for Mineral Projects (" NI 43-101 ").

Quality Assurance (QA) – Quality Control (QC)

All drill core samples, once received from the drill and processed, are sawn in half, labelled and bagged. The remaining drill core is subsequently stored on site at a secured facility in Wells, B.C., Canada, with the exception of 615 m of core drilled from the L1260 Sump for which the second half of the drill core was also bagged and sent to the lab for analysis. This extra data was logged and stored as FIELD DUP samples. Numbered security tags are applied to lab shipments for chain of custody requirements. All material retrieved in chip and channel sampling is bagged for assay. Quality control (QC) samples are inserted at regular intervals in the sample stream for both diamond drilling and underground chip and channel sampling, including blanks and reference materials with all sample shipments to monitor laboratory performance.

Drill core and underground chip and channel samples are submitted to MSALABS's analytical facility in Prince George, B.C., Canada, for preparation and analysis. The MSALABS facility is accredited to the ISO/IEC 17025 standard for gold assays and all analytical methods include quality control materials at set frequencies with established data acceptance criteria. The entire sample is dried, crushed, and split into sealed containers. Analysis for gold is by gamma ray analysis using the Chrysos Photon Assay (PA1408X). Samples are bombarded with gamma rays and the resulting signal is sent to the detectors.

Alternatively, drill core samples are submitted to ALS Geochemistry’s analytical facility in North Vancouver, British Columbia for preparation and analysis. The ALS facility is accredited to the ISO/IEC 17025 standard for gold assays and all analytical methods include quality control materials at set frequencies with established data acceptance criteria. The entire sample is crushed, and 250 grams is pulverized. Analysis for gold is by 50g fire assay fusion with atomic absorption (AAS) finish with a lower limit of 0.01 ppm and upper limit of 100 ppm. Samples with gold assays greater than 100 ppm are re-analyzed using a 1,000-gram screen metallic fire assay. A selected number of samples are also analyzed using a 48 multi-elemental geochemical package by a 4-acid digestion, followed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) and Inductively Coupled Plasma Mass Spectroscopy (ICP-MS).

Early program underground chip samples (UGCH00168 – UGCH00187) were transported to the Company’s nearby QR Mill Site complex for preparation and analysis at the internal QR Laboratory facilities. The Company's QR Mill Laboratory is not a certified analytical laboratory, but the facility is managed by a qualified Chief Assayer and certified OREAS QC standards and blanks are inserted at regular intervals in the sample stream to monitor laboratory performance. Samples are dried, crushed to 2.0-2.4 mm and a 200 g split is taken. The split is pulverized, and a 20 g Fire Assay with Atomic Absorption Spectroscopy (AAS) finish is completed to determine gold grades, reported in g/t. All samples herein that were initially processed at the QR Mill Laboratory were subsequently sent to ALS Geochemistry’s North Vancouver facility for reanalysis with higher grade (> 3.0 g/t) run to extinction for more robust validation.

ABOUT OSISKO DEVELOPMENT CORP.

Osisko Development Corp. is a continental North American gold development company focused on past-producing mining camps located in mining friendly jurisdictions with district scale potential. The Company's objective is to become an intermediate gold producer by advancing its flagship permitted 100%-owned Cariboo Gold Project, located in central B.C., Canada. Its project pipeline is complemented by the Tintic Project in the historic East Tintic mining district in Utah, U.S.A., and the San Antonio Gold Project in Sonora, Mexico—brownfield properties with significant exploration potential, extensive historical mining data, access to existing infrastructure and skilled labour. The Company's strategy is to develop attractive, long-life, socially and environmentally responsible mining assets, while minimizing exposure to development risk and growing mineral resources.

For further information, visit our website at www.osiskodev.com or contact:

Sean Roosen
Philip Rabenok
Chairman and CEO
Vice President, Investor Relations
Email: sroosen@osiskodev.com
Email: prabenok@osiskodev.com
Tel: +1 (514) 940-0685
Tel: +1 (437) 423-3644


CAUTION REGARDING FORWARD LOOKING STATEMENTS

Certain statements contained in this news release may be deemed "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 and "forward-looking information" within the meaning of applicable Canadian securities legislation (together, "forward-looking statements"). These forward-looking statements, by their nature, require Osisko Development to make certain assumptions and necessarily involve known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied in these forward-looking statements. Forward-looking statements are not guarantees of performance. Words such as "may", "will", "would", "could", "expect", "believe", "plan", "anticipate", "intend", "estimate", "continue", "objective", "strategy", or the negative or comparable terminology, as well as terms usually used in the future and the conditional, are intended to identify forward-looking statements. Information contained in forward-looking statements is based upon certain material assumptions that were applied in drawing a conclusion or making a forecast or projection, including the assumptions, qualifications, limitations or statements relating to the prospectivity of exploration in the Lowhee Zone and targets outside of the currently defined mineral resources; the results (if any) of further exploration work to define and expand mineral resources at depth; the results, timing, utility and significance of the ongoing 13,000-meter infill drill program (if any); the ability and utility of exploration work (including drilling) to inform resource modeling, mine planning, production stope design procedures and parameters, and the appropriate grid spacing for future infill drilling (if at all); the ability and timing (if at all) to complete future additional systemic grid infill drill programs; the interpretation and accuracy of structure modeling and assumptions in regard to potential resource extensions at depth (if at all); the Company's strategy and objectives relating to the Cariboo Gold Project as well as its other projects; the assumptions, qualifications and limitations relating to the Cariboo Gold Project being permitted; assumptions, qualifications and parameters underlying the Cariboo Technical Report (including, but not limited to, the mineral resources, mineral reserves, production profile, mine design and project economics); the results of the Cariboo Technical Report as an indicator of quality and robustness of the Cariboo Gold Project, as well as other considerations that are believed to be appropriate in the circumstances; the ability of the Company to achieve the estimates outlined in the Cariboo Technical Report in the timing contemplated (if at all); the ability to achieve the capital and operating costs outlined in the Cariboo Technical Report (if at all); the ability, progress and timing in respect of pre-construction activities at Cariboo including the 13,000-meter infill drill program; the contemplated work plan and activities at the Cariboo Gold Project and the timing, scope and results thereof and associated costs thereto; the potential impact of tariffs and other trade restrictions (if any); mineral resource category conversion; the future development and operations at the Cariboo Gold Project; management's perceptions of historical trends, current conditions and expected future developments; the utility and significance of historic data, including the significance of the district hosting past producing mines; future mining activities; the results (if any) of further exploration work to define and expand mineral resources; the ability of exploration work (including drilling and sampling) to accurately predict mineralization; the ability of the Company to expand mineral resources beyond current mineral resource estimates; the ability of the Company to complete its exploration and development objectives for its projects in the timing contemplated and within expected costs (if at all); the ongoing advancement of the deposits on the Company's properties; sustainability and environmental impacts of operations at the Company's properties; gold prices; the Project being shovel-ready; the costs required to advance the Company's properties; the ability to adapt to changes in gold prices, estimates of costs, estimates of planned exploration and development expenditures; the profitability (if at all) of the Company's operations; regulatory framework remaining defined and understood as well as other considerations that are believed to be appropriate in the circumstances, and any other information herein that is not a historical fact may be "forward looking information". Osisko Development considers its assumptions to be reasonable based on information currently available, but cautions the reader that their assumptions regarding future events, many of which are beyond the control of Osisko Development, may ultimately prove to be incorrect since they are subject to risks and uncertainties that affect Osisko Development and its business. Such risks and uncertainties include, among others, risks relating to third-party approvals, including the issuance of permits by governments, capital market conditions and the Company's ability to access capital on terms acceptable to the Company for the contemplated exploration and development at the Company's properties; the ability to continue current operations and exploration; regulatory framework and presence of laws and regulations that may impose restrictions on mining; errors in management's geological modelling; the timing and ability of the Company to obtain and maintain required approvals and permits; the results of exploration activities; risks relating to exploration, development and mining activities; the global economic climate; fluctuations in metal and commodity prices; fluctuations in the currency markets; dilution; environmental risks; and community, non-governmental and governmental actions and the impact of stakeholder actions. Osisko Development is confident a robust consultation process was followed in relation to its received BC Mines Act and Environmental Management Act permits for the Cariboo Gold Project and continues to actively consult and engage with Indigenous nations and stakeholders. While any party may seek to have the decision related to the BC Mines Act and/or Environmental Management Act permits reviewed by the courts, the Company does not expect that such a review would, were it to occur, impact its ability to proceed with the construction and operation of the Cariboo Gold Project in accordance with the approved BC Mines Act and Environmental Management Act permits. Readers are urged to consult the disclosure provided under the heading "Risk Factors" in the Company's annual information form for the year ended December 31, 2024 as well as the financial statements and MD&A for the year ended December 31, 2024 and quarter ended June 30, 2025, which have been filed on SEDAR+ ( www.sedarplus.ca ) under Osisko Development's issuer profile and on the SEC's EDGAR website ( www.sec.gov ), for further information regarding the risks and other factors facing the Company, its business and operations. Although the Company's believes the expectations conveyed by the forward-looking statements are reasonable based on information available as of the date hereof, no assurances can be given as to future results, levels of activity and achievements. The Company disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or results or otherwise, except as required by law. Forward-looking statements are not guarantees of performance and there can be no assurance that these forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.

Photos accompanying this announcement are available at:

https://www.globenewswire.com/NewsRoom/AttachmentNg/6f8827c8-7955-4189-8fc1-13f4098c3b7e

https://www.globenewswire.com/NewsRoom/AttachmentNg/c33f9d44-64a9-4529-8d94-9c97bc09373b

https://www.globenewswire.com/NewsRoom/AttachmentNg/dfbbc3ea-7e5e-4316-bb4c-5a6068a5ebe0

https://www.globenewswire.com/NewsRoom/AttachmentNg/e83f9d43-0d02-4c9f-8565-b2516bfa0b5d

https://www.globenewswire.com/NewsRoom/AttachmentNg/1dd12c56-b4c1-459a-9dfb-dfd05a424571


Stock Information
Company Name: Osisko Development Corp.
Stock Symbol: ODV
Market: NYSE
Website: osiskodev.com
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