Thunder Mountain Gold, Inc. Consolidated Statements of Changes in Stockholders' Equity (Deficit) - USD ($)		Common Stock Shares	Common Stock Amount	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Non-Controlling Interest in OGT	Total
Beginning balance, value at Dec. 31, 2015			$ 44,168	$ 4,193,797	$ (24,200)	$ (4,441,489)		$ (227,724)
Beginning balance, shares at Dec. 31, 2015		44,167,549
Shares issued for exercise of stock options, value								$ 359,000
Shares issued for exercise of stock options, stock								3,590,000
Sale of stock, value			9,290	634,710				$ 644,000
Sale of stock, stock		9,290,000
Common stock issued for payments on related parties notes payable, value			1,020	50,980				52,000
Common stock issued for payments on related parties notes payable, stock		1,020,000
Common stock issued for payments on accounts payable, value			203	20,231				20,434
Common stock issued for payments on accounts payable, stock		203,030
Stock options issued for services				175,199				175,199
Net assets acquired in Owyhee Gold Trust settlement	[1]			275,596			$ 173,702	449,298
Net income (loss)						(1,043,317)	5,000	(1,038,317)
Ending balance, value at Dec. 31, 2016			54,681	5,350,513	(24,200)	(5,484,806)	178,702	74,890
Ending balance, shares at Dec. 31, 2016		54,680,579
Shares issued for exercise of stock options, value			415	40,135				$ 40,550
Shares issued for exercise of stock options, stock		415,000						3,590,000
Beneficial conversion feature on related party note payable				13,333				$ 13,333
Distribution to noncontrolling interest							(5,000)	(5,000)
Stock options issued for services				53,557				53,557
Net assets acquired in Owyhee Gold Trust settlement	[1]
Net income (loss)						(711,117)	409	(710,708)
Ending balance, value at Dec. 31, 2017			$ 55,096	$ 5,457,538	$ (24,200)	$ (6,195,923)	$ 174,111	$ (533,378)
Ending balance, shares at Dec. 31, 2017		55,095,579

[1] Note 3