TARTAN MINE PROJECT

About Tartan Mine Project

Located in Manitoba, Canada

Tartan Mine Project, located near Flin Flon, Manitoba, with the release of an updated Mineral Resource Estimate highlighting strong growth potential and future production opportunities. McEwen Inc. expects initial annual production at Tartan to average approximately 30,000 gold ounces, with the potential to expand throughput through future permit modifications. The Company believes that doubling the potential mill capacity from 500 tonnes per day (tpd) to 1,000 tpd could see production grow to 45,000 - 55,000 ounces per year.

The updated resource reinforces Tartan as a high-grade underground gold asset positioned to contribute to long-term production growth.

Mineral Resource Summary

Indicated
Tonnes	Grade (gpt)	Gold (oz)
2,619,000	3.67	308,900

Inferred
Tonnes	Grade (gpt)	Gold (oz)
2,832,900	3.32	302,700

Underground: Cut-off Grade 1.35 gpt Au

GROWTH OPPORTUNITIES

Exploration results indicate several avenues for expanding the resource base:

1. Near-Resource Expansion

Western and Eastern Flanks of the Main Zone remain open.
Additional drilling planned to extend mineralization along strike.

2. Depth Potential

Mineralization remains open vertically within:

Main Zone
South Zone

3. District-Scale Upside

The adjacent Tartan West property shows encouraging historical results and surface sampling anomalies.

These targets support the company’s strategy of growing ounces through systematic exploration.

NEXT STEPS

Upcoming work programs are expected to include:

Resource expansion drilling
Technical and economic evaluations
Mine redevelopment planning
Exploration across satellite targets

Ongoing exploration is anticipated to further define the scale and continuity of gold mineralization.

Tartan Mine Project Location Relative to Flin Flon and Tartan Shear Location on McEwen Mineral Claims
(Manitoba and Saskatchewan)

Plan Map of Tartan Mine’s Main and South Zones

Long Section of Tartan Mine’s Main Zone


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