STLLR Continues to Intersect Consistent Grades at the Hollinger Tailings Project

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STLLR Continues to Intersect Consistent Grades at the

Hollinger Tailings Project

TORONTO, ONTARIO, May 1, 2025 – STLLR Gold Inc. (TSX: STLR) (OTCQX: STLRF) (FSE: O9D)

(“STLLR” or the “Company”) is pleased to report additional encouraging 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, with most holes returning mineralized values

throughout their full length.

• Gold g rades w arrant f urther studies: Most h oles returned grades that justify advancing

toward a potential mineral resource estimate and further economic evaluation.

• Drilling complete; 20% of holes reported: With this latest release, results have now been

published for 81 of the 423 completed sonic drill holes. The holes reported to date are

primarily located in the north-central portion of Hollinger. The characterization program is

now complete and assay results for the remaining holes are pending.

T

able 1: Hollinger Characterization Program Assay Highlights (For more information see Tables 2

& 3 and Figures 1 to 4):

Zone Hole ID Assay Result

Hollinger HTF25-061 0.50 grams per tonne gold (“g/t Au”) over 24.40 metres (“m”)

(including 0.53 g/t Au over 2.15 m & 0.60 g/t Au over 13.00 m)

Hollinger HTF25-063 0.50 g/t Au over 21.35 m (including 0.55 g/t Au over 11.25 m)

Hollinger HTF25-065 0.50 g/t Au over 19.80 m (including 0.51 over 3.50 m &

0.54 m 10.05 m)

Hollinger HTF25-083 0.51 g/t Au over 19.80 m (including 0.53 g/t Au over 15.25 m)

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Keyvan Salehi, P.Eng., MBA, President, CEO, and Director of STLLR, commented: “We continue to

see consistent gold grades throughout the full length of most holes at Hollinger, supporting the

potential for mining and milling, subject to further technical evaluation. This latest batch builds on

earlier results, extending the zone of mineralized continuity to approximately 500 metres.”

“We’ve released 81 of the 423 holes at Hollinger. The characterization program is now complete, and

we will provide further updates as we receive 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 streamline permitting,

enabling reprocessing of legacy tailings while promoting environmental remediation. With low capital

requirements and favorable gold prices, the Company believes that Hollinger offers significant

upside potential.

In February 2025, STLLR launched a characterization program to assess the project’s value, establish

a path towards a mineral resource estimate, and gather information for a recovery and remediation

plan. The Company has completed 11,223 m from 423 holes using sonic drills, with the holes spaced

by 50 m in a grid pattern. The results continue to demonstrate consistent gold grades across

multiple holes, reinforcing the case for advanc ing toward a mineral resource estimate and

preliminary economic analysis at today’s strong gold prices. Please review Figures 1 to 4 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 – Drill Location Map Zoomed In

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Figure 3: Hollinger Characterization Program – Section “N-S”

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Figure 4: Hollinger Characterization Program – Section “E-W”

Table 2: Hollinger Characterization Intercepts*

Target Hole ID From

(m)

To

(m)

Interval

(m)

Grade

(g/t Au)

Metal

Factor

(g/t Au x m)

Hollinger HTF25-061 0.00 24.40 24.40 0.50 12.25

Hollinger including 0.00 2.15 2.15 0.53 1.15

Hollinger including 9.15 22.15 13.00 0.60 7.77

Hollinger HTF25-063 0.00 21.35 21.35 0.50 10.74

Hollinger including 9.15 20.40 11.25 0.55 6.17

Hollinger HTF25-065 0.00 19.80 19.80 0.50 9.92

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Target Hole ID From

(m)

To

(m)

Interval

(m)

Grade

(g/t Au)

Metal

Factor

(g/t Au x m)

Hollinger including 0.00 3.50 3.50 0.51 1.80

Hollinger including 9.75 19.80 10.05 0.54 5.47

Hollinger HTF25-067 0.00 23.40 23.40 0.44 10.39

Hollinger including 16.75 23.40 6.65 0.57 3.77

Hollinger HTF25-069 0.00 24.21 24.21 0.45 11.00

Hollinger including 0.00 1.80 1.80 0.64 1.14

Hollinger HTF25-071 2.40 26.70 24.30 0.43 10.55

Hollinger including 21.35 25.90 4.55 0.58 2.63

Hollinger HTF25-073 0.00 26.70 26.70 0.35 9.23

Hollinger HTF25-082 8.60 23.65 15.05 0.45 6.70

Hollinger HTF25-083 0.00 19.80 19.80 0.51 10.15

Hollinger including 3.05 18.30 15.25 0.53 8.15

Hollinger HTF25-084 8.35 24.40 16.05 0.40 6.43

Hollinger including 19.00 21.35 2.35 0.71 1.66

Hollinger HTF25-085 0.00 15.25 15.25 0.48 7.37

Hollinger including 0.00 3.05 3.05 0.56 1.70

Hollinger including 5.20 15.25 10.05 0.51 5.08

Hollinger HTF25-086 8.55 25.90 17.35 0.34 5.94

Hollinger including 16.00 18.30 2.30 0.50 1.15

Hollinger HTF25-087 3.70 25.90 22.20 0.46 10.26

Hollinger including 13.00 25.90 12.90 0.55 7.05

Hollinger HTF25-088 9.61 28.70 19.09 0.30 5.69

Hollinger HTF25-089 7.30 29.70 22.40 0.42 9.50

Hollinger including 18.30 24.40 6.10 0.54 3.28

Hollinger HTF25-090 7.05 23.00 15.95 0.45 7.19

Hollinger including 17.50 22.30 4.80 0.57 2.73

Hollinger HTF25-091 7.15 25.90 18.75 0.40 7.59

Hollinger including 17.55 23.60 6.05 0.50 3.03

Hollinger HTF25-093 6.10 22.85 16.75 0.38 6.35

Hollinger including 18.30 19.80 1.50 0.54 0.82

Hollinger HTF25-094 9.75 23.95 14.20 0.36 5.09

Hollinger HTF25-095 7.20 25.10 17.90 0.43 7.75

Hollinger including 18.30 24.40 6.10 0.52 3.15

Hollinger HTF25-096 9.00 26.40 17.40 0.34 5.87

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Target Hole ID From

(m)

To

(m)

Interval

(m)

Grade

(g/t Au)

Metal

Factor

(g/t Au x m)

Hollinger HTF25-097 8.05 25.90 17.85 0.40 7.22

Hollinger including 18.30 21.35 3.05 0.68 2.07

Hollinger HTF25-098 2.70 22.00 19.30 0.27 5.12

Hollinger HTF25-101 8.70 24.40 15.70 0.39 6.06

Hollinger HTF25-102 7.10 25.70 18.60 0.31 5.76

Hollinger HTF25-103 7.20 10.65 3.45 0.43 1.49

Hollinger and 13.70 24.40 10.70 0.34 3.67

Hollinger HTF25-106 0.60 18.30 17.70 0.26 4.62

Hollinger HTF25-107 8.75 26.50 17.75 0.35 6.28

Hollinger including 19.80 21.35 1.55 0.77 1.19

Hollinger HTF25-110 0.75 18.65 17.90 0.26 4.57

Hollinger HTF25-114 6.85 25.90 19.05 0.27 5.17

Hollinger HTF25-116 5.40 20.10 14.70 0.30 4.38

Hollinger HTF25-118 5.55 16.00 10.45 0.43 4.45

*Note: Included intercepts are calculated using a 0.5 g/t Au cut-off and a maximum of 2 m internal dilutions

Table 3: Hollinger Characterization Hole Details

Zone Hole ID Easting Northing Elevation Az Inclination

End of

Hole

Depth

(m)

Hollinger HTF25-061 476504.767 5367017.903 318.54 0 -90 27.45

Hollinger HTF25-063 476558.253 5367018.055 318.98 0 -90 24.40

Hollinger HTF25-065 476607.301 5367018.648 319.36 0 -90 19.80

Hollinger HTF25-067 476664.322 5367023.796 321.45 0 -90 25.90

Hollinger HTF25-069 476661.807 5366966.128 321.30 0 -90 27.20

Hollinger HTF25-071 476654.837 5366917.188 321.61 0 -90 27.45

Hollinger HTF25-073 476656.226 5366872.755 320.52 0 -90 30.50

Hollinger HTF25-082 476856.637 5367017.421 327.00 0 -90 25.90

Hollinger HTF25-083 476710.192 5367023.616 321.62 0 -90 19.80

Hollinger HTF25-084 476857.912 5366967.903 327.33 0 -90 30.50

Hollinger HTF25-085 476756.950 5367016.466 321.39 0 -90 15.25

Hollinger HTF25-086 476860.063 5366920.659 327.02 0 -90 28.95

Hollinger HTF25-087 476713.145 5366965.873 324.45 0 -90 30.50

Hollinger HTF25-088 476854.786 5366869.039 327.40 0 -90 33.50