Thunder Mountain Gold, Inc. engages in the exploration and development of mining properties in Nevada and Idaho, the United States. It explores for zinc, silver, gold, and copper deposits, as well as base metals and other commodities. The company holds interests in the South Mountain property that includes 18 patented mining claims covering an area of approximately 346 acres; 36 acres of private land; 34 unpatented lode mining claims covering an area of 550 acres; and leased private land covering an area of 489 acres located in the South Mountain Mining District, Owyhee County, Idaho. It also holds interests in the Trout Creek project, which comprises 26 unpatented claims covering an area of approximately 533 acres located in Lander County, Nevada. Thunder Mountain Gold, Inc. was incorporated in 1935 and is based in Boise, Idaho.