• Thunder Mountain Gold reported early results from its 2026 drilling program at the South Mountain polymetallic project in Idaho.
• Four holes tested the undrilled up-dip extension of the DMEA massive-sulfide zone, hitting skarn alteration with copper, zinc, lead sulfides.
• Key intercept: 22.47 m grading 86 g/t silver and 0.105 g/t gold, including 10.15 m at 141 g/t silver.
• Step-out drilling at the Kentucky Ridge target intersected new mineralization about 250 m west of the resource area; continuity traced about 80 m.
• Program totals 8,500 feet of diamond drilling aimed at expanding the carbonate replacement deposit resource; multiple assays remain pending.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Thunder Mountain Gold Inc. published the original content used to generate this news brief via Newsfile (Ref. ID: 202609170700NEWSFILECNPR____20260917_314727_1) on September 17, 2026, and is solely responsible for the information contained therein.