First Mining Gold Confirms Gold & Silver Mineralization at Springpole Project's East Extension

• Final 2024 drilling results from Springpole's East Extension show significant gold and silver grades consistent with the established resource.
• Drill hole SP24-011 returned two broad mineralized intervals including 0.75 g/t Au and 3.30 g/t Ag over 134.2 m.
• The East Extension Phase 1 drilling program successfully identified continuous mineralization within the current PFS open-pit development footprint.
• Results suggest potential to convert material currently classified as "waste" into "ore," which could increase processed ore and reduce the strip ratio.
• First Mining believes Springpole will be a major economic and sustainable development for communities in Northwestern Ontario.

First Mining Gold Corp. (TSX:FF), a gold developer advancing two of the largest gold projects in Canada, has announced final drilling results from the 2024 East Extension Phase 1 diamond drilling program at its Springpole Gold Project in northwestern Ontario. First Mining is focused on advancing the Springpole Project, where a Feasibility Study has commenced and permitting activities are ongoing, as well as the PEA-stage Duparquet Gold Project in Quebec. The company also owns the Cameron Gold Project in Ontario and a portfolio of gold project interests.

East Extension Drilling Confirms Mineralization Continuity

The five-hole, 2,293 m East Extension Phase 1 drilling campaign, completed in Fall 2024, targeted resource growth opportunities east of the main Springpole mineral resource. Drill holes SP24-011, SP24-009, and previously reported SP24-007 returned gold and silver grades representative of the established resource grade profile.

Most notably, the northernmost hole SP24-011 intersected two broad mineralized intervals: 0.75 g/t Au and 3.30 g/t Ag over 134.2 m, and 0.67 g/t Au and 12.79 g/t Ag over 105.4 m

These results confirm an opportunity for mineralization expansion in continuity with the current open pit, which remains open for further exploration.

Waste to Ore & Improve Project Economics

The East Extension Phase 1 drilling program successfully identified significant widths of continuous mineralization in an underexplored area within the current Pre-Feasibility Study (PFS) open-pit development footprint. Highlights suggest the potential to further extend mineralization and reclassify material currently considered "waste" into "ore" in the proposed run of mine (ROM) pit design.

Dan Wilton, CEO of First Mining, provided details in the company news release:

"Our advancements continue to demonstrate the Springpole Project as a robust gold and silver resource development opportunity within an important mining region of Ontario. The results from the East Extension are especially encouraging as they demonstrate the presence of additional gold and silver mineralization inside the existing mine footprint, potentially converting waste to ore."

This conversion could potentially reduce the strip ratio and increase processed ore tonnes, positively impacting the project's overall economics.

Upcoming Exploration Activities

First Mining plans to integrate the latest drill hole results into an updated 3D model and delineate further exploration plans for the East Extension target and near-pit brownfield exploration targets. The East Extension target, located at the southeastern boundary of the current mineral resource and proposed open pit, remains open along strike to the south and southeast of the main Portage Zone.

"As we continue to advance through the Environmental Assessment process, we believe that the Springpole Project will be a major economic and sustainable infrastructure driver for Northwestern Ontario communities," added Wilton.

For Investors

First Mining Gold's latest drilling results from the East Extension target at the Springpole Gold Project confirm the potential for mineralization expansion within the existing open-pit design. The successful identification of continuous mineralization in an underexplored area suggests the opportunity to convert waste material into ore, potentially improving the project's economics by reducing the strip ratio and increasing processed ore tonnes.

As First Mining advances the Springpole Project through the Feasibility Study and permitting stages, the company believes the project will become a significant economic and sustainable development driver for communities in Northwestern Ontario. Investors should monitor First Mining's progress as it continues to unlock value at the Springpole Gold Project and its other gold projects in Canada.