Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2021	Aug. 16, 2021
Registrant CIK	0001288750
Fiscal Year End	--09-30
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-34055
Entity Registrant Name	TIMBERLINE RESOURCES CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-0291227
Entity Address, Address Line One	101 EAST LAKESIDE AVENUE
Entity Address, City or Town	COEUR D’ALENE
Entity Address, State or Province	ID
Entity Address, Postal Zip Code	83814
City Area Code	208
Local Phone Number	664-4859
Title of 12(g) Security	Common Stock, $0.001 par value
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		139,558,522
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
OTCQB
Trading Symbol	TLRS
Security Exchange Name	NONE
TSX-V
Trading Symbol	TBR
Security Exchange Name	NONE