STLLR Gold Delivers Remaining Assay Results With Encouraging Gold Mineralization from its Hollinger Tailings Project
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STLLR Gold Delivers Remaining Assay Results With Encouraging
Gold Mineralization from its Hollinger Tailings Project
TORONTO, ONTARIO, August 7, 2025 – STLLR Gold Inc. (TSX: STLR) (OTCQX: STLRF) (FSE: O9D)
(“STLLR” or the “Company”) is pleased to report the remaining results from its 2025 characterization
program at the Hollinger Tailings Project (“Hollinger” or the “Project”) located in the Timmins Mining
Camp, Ontario, Canada.
Key takeaways from the Hollinger characterization program:
• Consistent grade profile: Results from the program demonstrate uniform grade distribution
across drilled intervals. Most holes returned mineralized values throughout their full length.
• Grade Trends Within Hollinger: The Company observed higher gold grades in Phase 1 (the
northern portion of Hollinger; see Figure 1), particularly near the southern end where the
historical tailings dam wall is located. Overall results support the economic potential of
Hollinger and its further advancement towards a mineral resource estimate and metallurgical
testing.
• Metallurgical Testing and Mineral Resource Modelling Underway: STLLR has initiated
metallurgical testing of the Hollinger material, with a mineral resource estimate to follow.
Results from both programs are expected in the second half of 2025.
• Further Characterization Opportunities: While the 2025 program successfully covered the
majority of the Hollinger deposit, certain areas—such as the ponds and the eastern extent of
Phase 1—remain to be characterized in future phases to further enhance the dataset.
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Table 1: Hollinger Characterization Program Assay Highlights (For more information see Tables 2 & 3
and Figures 1 to 5):
Hole ID Assay Result
HTF25-215 0.70 grams per tonne gold (“g/t Au”) over 23.70 metres (“m”)
KP25-04 0.57 g/t Au over 21.75 m
HTF25-224 0.56 g/t Au over 23.45 m (including 0.58 g/t Au over 3.00 m &
0.63 g/t Au over 11.85 m)
HTF25-265 0.56 g/t Au over 16.20 m (including 0.65 g/t Au over 8.60 m)
HTF25-225 0.54 g/t Au over 25.35 m (including 0.64 g/t Au over 13.40 m)
HTF25-129 0.54 g/t Au over 23.40 m (including 0.62 g/t Au over 9.70 m)
HTF25-038 0.53 g/t Au over 22.05 m (including 0.68 g/t Au over 5.40 m &
0.60 g/t Au over 10.55 m)
HTF25-233 0.53 g/t Au over 21.90 m (including 0.56 g/t Au over 4.10 m &
0.59 g/t Au over 7.40 m)
HTF25-234 0.53 g/t Au over 22.45 m (including 0.53 g/t Au over 5.60 m &
0.61 g/t Au over 10.65 m)
HTF25-250 0.53 g/t Au over 20.10 m (including 0.56 g/t Au over 5.10 m &
0.56 g/t Au over 8.10 m)
HTF25-226 0.52 g/t Au over 26.40 m (including 0.61 g/t Au over 14.00 m
HTF25-227 0.52 g/t Au over 23.60 m (including 0.62 g/t Au over 4.00 m &
0.60 g/t Au over 11.75 m)
HTF25-232 0.52 g/t Au over 23.90 m (including 0.65 g/t Au over 3.05 m &
0.55 g/t Au over 12.35 m)
HTF25-249 0.52 g/t Au over 19.60 m (including 0.70 g/t Au over 1.50 m &
0.55 g/t Au over 8.85 m)
Keyvan Salehi, P.Eng., MBA, President, CEO, and Director of STLLR, commented: “We’ve concluded
the assaying of the successful 2025 Hollinger characterization program. We are pleased with the
consistent gold mineralization across the facility and are encouraged by the gold grades we have
observed. We remain encouraged by Hollinger’s economic potential at current gold prices. T he
results of the metallurgical testing program and the mineral resource estimate are key data points
that can allow us to assess Hollinger’s near-term cash flow potential.”
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Hollinger Characterization Program
Located in southeast Timmins, Ontario, the Hollinger Tailings Project holds tailings from the historic
Hollinger Mine, once the world’s largest gold mine. Operating from 1910 to 1968, it produced 19 million
ounces of gold at an average grade of 9.9 grams per tonne.1 The site contains an estimated 50–60
million tonnes of tailings. Recent amendments to Ontario’s Mining Act2 have streamlined the
permitting process for reprocessing historical tailings, aligning economic opportunity with
environmental remediation. Given current gold prices and the potential for low capital intensity,
STLLR believes Hollinger presents significant opportunity for value creation.
STLLR’s comprehensive characterization program is designed to assess the Project’s potential and
information gathering for a recovery permit and remediation plan. The Company has completed
11,223 metres of sonic drilling across 423 holes, spaced on a 50 m grid pattern. Assay results
demonstrate consistent gold mineralization across the facility. The Company is currently advancing
a metallurgical testing program to evaluate recovery potential, with results and a mineral resource
estimate targeted for release in the second half of 2025. Please review Figures 1 to 5 and Tables 1 to
3 for further context.
1 Hollinger Historical Production Statistics, Geology Ontario database: https://www.geologyontario.mines.gov.on.ca/persistent-
linking?mineral-inventory=MDI42A06NW00007
2 Ontario’s new “Mining Act for Recovery of Minerals” regulation to be in effect July 1, 2025. For more details:
https://news.ontario.ca/en/release/1005407/ontario-supporting-recovery-of-residual-metals-and-minerals
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Figure 1: Hollinger Characterization Program - Drill Location Map
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Figure 2: Hollinger Characterization Program – Zoomed In Drill Location Map #1
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Figure 3: Hollinger Characterization Program – Zoomed In Drill Location Map #2
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Figure 4: Hollinger Characterization Program – Section “A-B” Looking North
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Figure 5: Hollinger Characterization Program – Section “C-D” Looking North
Table 2: Hollinger Characterization Intercepts*
Hole ID From (m) To (m) Interval (m) Grade
(g/t Au)
Metal
Factor
g/t Au x m
Area
HTF25-031 0.00 20.60 20.60 0.50 10.32 Phase 1
including 10.65 20.00 9.35 0.58 5.45 Phase 1
HTF25-034 0.00 23.65 23.65 0.37 8.68 Phase 1
including 21.35 23.65 2.30 0.64 1.48 Phase 1
HTF25-038 0.00 22.05 22.05 0.53 11.61 Phase 1
including 0.70 6.10 5.40 0.68 3.66 Phase 1
including 8.15 18.70 10.55 0.60 6.34 Phase 1