Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2024	Apr. 21, 2024
Document Information [Line Items]
Registrant Name	THUNDER MOUNTAIN GOLD, INC.
Registrant CIK	0000711034
Fiscal Year End	--12-31
SEC Form	10-Q
Period End date	Mar. 31, 2024
Document Quarterly Report	true
Tax Identification Number (TIN)	91-1031015
Number of common stock shares outstanding		60,855,579
Filer Category	Non-accelerated Filer
Current with reporting	Yes
Interactive Data Current	Yes
Shell Company	false
Small Business	true
Emerging Growth Company	false
Document Transition Report	false
Entity File Number	001-08429
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	11770 W President Dr. STE F
Entity Address, City or Town	Boise
Entity Address, State or Province	ID
Entity Address, Postal Zip Code	83713-8986
City Area Code	208
Local Phone Number	658-1037
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Exchange OTCQB [Member]
Document Information [Line Items]
Trading Symbol	THMG
Trading Exchange	NONE
Title of 12(g) Security	Common Stock, $0.001 par value
Exchange TSX-V [Member]
Document Information [Line Items]
Trading Symbol	THM
Trading Exchange	NONE
Title of 12(g) Security	Common Stock, $0.001 par value