Promising Assay Results from STLLR Gold’s Hollinger Tailings Project Provides Confirmation of Gold Throughout the Tested Facility
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Promising Assay Results from STLLR Gold’s Hollinger Tailings
Project Provides Confirmation of Gold Throughout
the Tested Facility
TORONTO, ONTARIO, June 16, 2025 – STLLR Gold Inc. (TSX: STLR) (OTCQX: STLRF) (FSE: O9D)
(“STLLR” or the “Company”) is pleased to report additional promising results from its
characterization program at the Hollinger Tailings Project (“Hollinger”) located in the Timmins Mining
Camp, Ontario, Canada.
Key takeaways from additional results at the Hollinger characterization program:
• Consistent grade profiles: Results from the latest batch continue to demonstrate uniform
grade distribution across drilled intervals. Most holes returned mineralized values throughout
their full length.
• Emerging Grade Trends Within Hollinger: The Company is observing higher-than-average
gold grades in Phase 1, the northern portion of Hollinger (see Figure 1). Overall results support
continued advancement of Hollinger towards a potential mineral resource estimate and
further economic evaluation.
• Metallurgical Program Advancing: With approximately 75% of assay results now received,
STLLR has sufficient data to scope and design a targeted metallurgical testing program for
the Hollinger material. Planning and preparatory work for the program is currently underway,
with results anticipated in the second half of 2025.
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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
KP25-01 0.56 grams per tonne gold (“g/t Au”) over 20.15 metres (“m”)
(including 0.65 g/t Au over 12.75 m)
HTF25-229 0.54 g/t Au over 23.75 m
HTF25-158 0.47 g/t Au over 27.45 m (including 0.97 over 8.45 m)
HTF25-345 0.52 g/t Au over 23.45 m (including 0.66 g/t Au over 2.00 m &
0.57 g/t Au over 8.55 m)
Keyvan Salehi, P.Eng., MBA, President, CEO, and Director of STLLR, commented: “The Hollinger
characterization program continues to demonstrate consistent gold mineralization across the
facility, supported by more than 75% of assay results received to date. We are seeing multiple zones
returning above-average grades, further reinforcing our confidence in the project's potential.”
“The information gathered to date provides a strong foundation to advance toward a mineral
resource estimate and initiate an economic evaluation. In parallel, we are actively progressing the
design of a metallurgical testing program to assess recovery potential. Both the mineral resource
estimate and results from the metallurgical program are expected to be released in the second half
of this year. We look forward to reporting the remaining assay results in the coming weeks.”
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.
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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In February 2025, STLLR launched a comprehensive characterization program to assess the
project’s potential, establishing a path towards a mineral resource estimate, 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 from the 317 holes
received to date continue to demonstrate consistent gold mineralization across the facility, with
several areas returning grades above the overall average. The Company is currently advancing the
design of a metallurgical testing program to evaluate recovery potential, with results and a potential
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.
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Figure 1: Hollinger Characterization Program - Drill Location Map
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Figure 2: Hollinger Characterization Program – Drill Location Map Zoomed In #1
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Figure 3: Hollinger Characterization Program – Drill Location Map Zoomed In #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
HTF25-027 0.00 23.80 23.80 0.44 10.50 Phase 1
including 4.55 6.50 1.95 0.57 1.11 Phase 1
including 12.30 18.30 6.00 0.55 3.33 Phase 1
HTF25-032 0.00 23.35 23.35 0.32 7.44 Phase 1
HTF25-036 0.00 23.69 23.69 0.35 8.18 Phase 1
HTF25-044 0.00 22.30 22.30 0.33 7.37 Phase 1
HTF25-049 0.00 23.35 23.35 0.38 8.82 Phase 1
HTF25-054 0.00 22.55 22.55 0.24 5.52 Phase 1
HTF25-056 0.43 23.60 23.17 0.29 6.61 Phase 1