Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Feb. 15, 2024	Jun. 30, 2023
Document Information [Line Items]
Registrant Name	Thunder Mountain Gold, Inc.
Registrant CIK	0000711034
Fiscal Year End	--12-31
SEC Form	10-K
Period End date	Dec. 31, 2023
Tax Identification Number (TIN)	91-1031015
Number of common stock shares outstanding		60,855,579
Public Float			$ 2,595,841
Filer Category	Non-accelerated Filer
Current with reporting	Yes
Interactive Data Current	Yes
Voluntary filer	No
Well-known Seasoned Issuer	No
Shell Company	false
Small Business	true
Emerging Growth Company	false
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	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
City Area Code	208
Local Phone Number	658-1037
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Auditor Name	Assure CPA LLC
Auditor Location	Spokane, Washington
Auditor Firm ID	444
ICFR Auditor Attestation Flag	false
ExchangeTSXV
Document Information [Line Items]
Trading Symbol	THM
Trading Exchange	NONE
Title of 12(g) Security	Common Stock, $0.001 par value
ExchangeOTCQB
Document Information [Line Items]
Trading Symbol	THMG
Trading Exchange	NONE
Title of 12(g) Security	Common Stock, $0.001 par value