Foremost Clean begins winter drilling at Hatchet Lake

Executive Summary

• Foremost Clean Energy Ltd. has commenced its planned approximately 5,000-metre winter diamond drill program at its Hatchet Lake uranium project in Northern Saskatchewan.
• Initial drilling is focused on the Tuning Fork target area to follow up on the 2025 discovery (hole TF-25-16) and test the continuity of mineralization along-strike and downdip.
• The program aims to refine structural controls on uranium emplacement and evaluate additional high-priority targets across Hatchet Lake South and Hatchet Lake North.

Key Details

• Program Scope: Approximately 5,000 metres of winter diamond drilling.
• Location: Hatchet Lake uranium project, eastern Athabasca basin region, Northern Saskatchewan.
• Primary Target (Tuning Fork):
  • Located in Hatchet Lake South.
  • Focuses on a previously untested 600-metre gap between historic drill holes.
  • Objectives: Test along-strike and down-dip continuity of mineralization; refine structural controls at the Athabasca unconformity; test a recently identified EM conductor to the west of the 2025 discovery.
• Historical Context (2025 Discovery):
  • Drill hole TF-25-16 intersected 0.87% U3O8 over 0.45 metres within a broader 6.2-metre interval averaging 0.10% U3O8 at the Athabasca unconformity.
• Additional Targets:
  • Hatchet Lake South (Beta Grid): Structurally controlled target characterized by interpreted displacement of the Athabasca unconformity associated with a conductive corridor.
  • Hatchet Lake North (Richardson SE): Encompasses more than five kilometres of untested electromagnetic conductor strike length along the basin margin. Recent ground gravity survey results are being integrated to refine targeting.
• Technical Basis: Drill targets were prioritized using Denison Mines Corp.'s historical drilling and geophysical data sets, refined through Foremost's updated interpretation and conductor modelling.
• Qualified Person: Cameron MacKay, PGeo, Vice-President of Exploration.

Notable Quotes

• Jason Barnard, President and CEO: "We are pleased to confirm that drilling is now under way at Hatchet Lake as we advance the Tuning Fork discovery. This program is designed to build on the 2025 results by systematically testing continuity of mineralization at the Athabasca unconformity and refining the structural and alteration framework controlling uranium mineralization. With multiple drill-ready targets defined across the property, we look forward to executing a focused and results-driven winter campaign."