1. Summary of Significant Accounting Policies and Business Operations (Details)	12 Months Ended
Dec. 31, 2014
Details
Nature of Operations	Business Operations Thunder Mountain Gold, Inc. (“Thunder Mountain” or “the Company”) was originally incorporated under the laws of the State of Idaho on November 9, 1935, under the name of Montgomery Mines, Inc. In April 1978, the Montgomery Mines Corporation was obtained by a group of the Thunder Mountain property holders and changed its name to Thunder Mountain Gold, Inc., with the primary goal to further develop their holdings in the Thunder Mountain Mining District, located in Valley County, Idaho. Thunder Mountain Gold, Inc. takes its name from the Thunder Mountain Mining District, where its principal lode mining claims were located. For several years, the Company’s activities were restricted to maintaining its property position and exploration activities. During 2005, the Company sold its holdings in the Thunder Mountain Mining District. During 2007, the Company acquired the South Mountain Mines property in southwest Idaho and initiated exploration activities on that property, which continue today.
Going Concern Note	Going Concern The accompanying consolidated financial statements have been prepared under the assumption that the Company will continue as a going concern. The Company is an exploration stage company and has historically incurred losses and does not have sufficient cash at December 31, 2014 to fund normal operations for the next 12 months. The Company has no recurring source of revenue and its ability to continue as a going concern is dependent on the Company’s ability to raise capital to fund its future exploration and working capital requirements. The Company’s plans for the long-term return to and continuation as a going concern include financing the Company’s future operations through sales of its common stock and/or debt and the eventual profitable exploitation of its mining properties. Additionally, the current capital markets and general economic conditions in the United States are significant obstacles to raising the required funds. These factors raise substantial doubt about the Company’s ability to continue as a going concern. The Company is currently investigating a number of alternatives for raising additional capital with potential investors, lessees and joint venture partners. The consolidated financial statements do not include any adjustments that might be necessary should the Company be unable to continue as a going concern. If the going concern basis was not appropriate for these financial statements, adjustments would be necessary in the carrying value of assets and liabilities, the reported expenses and the balance sheet classifications used.

1. Summary of Significant Accounting Policies and Business Operations (Details)

12 Months Ended

Dec. 31, 2014

Business Operations Thunder Mountain Gold, Inc. (“Thunder Mountain” or “the Company”) was originally incorporated under the laws of the State of Idaho on November 9, 1935, under the name of Montgomery Mines, Inc. In April 1978, the Montgomery Mines Corporation was obtained by a group of the Thunder Mountain property holders and changed its name to Thunder Mountain Gold, Inc., with the primary goal to further develop their holdings in the Thunder Mountain Mining District, located in Valley County, Idaho. Thunder Mountain Gold, Inc. takes its name from the Thunder Mountain Mining District, where its principal lode mining claims were located. For several years, the Company’s activities were restricted to maintaining its property position and exploration activities. During 2005, the Company sold its holdings in the Thunder Mountain Mining District. During 2007, the Company acquired the South Mountain Mines property in southwest Idaho and initiated exploration activities on that property, which continue today.

Going Concern Note

Going Concern The accompanying consolidated financial statements have been prepared under the assumption that the Company will continue as a going concern. The Company is an exploration stage company and has historically incurred losses and does not have sufficient cash at December 31, 2014 to fund normal operations for the next 12 months. The Company has no recurring source of revenue and its ability to continue as a going concern is dependent on the Company’s ability to raise capital to fund its future exploration and working capital requirements. The Company’s plans for the long-term return to and continuation as a going concern include financing the Company’s future operations through sales of its common stock and/or debt and the eventual profitable exploitation of its mining properties. Additionally, the current capital markets and general economic conditions in the United States are significant obstacles to raising the required funds. These factors raise substantial doubt about the Company’s ability to continue as a going concern. The Company is currently investigating a number of alternatives for raising additional capital with potential investors, lessees and joint venture partners. The consolidated financial statements do not include any adjustments that might be necessary should the Company be unable to continue as a going concern. If the going concern basis was not appropriate for these financial statements, adjustments would be necessary in the carrying value of assets and liabilities, the reported expenses and the balance sheet classifications used.