Document and Entity Information - shares	6 Months Ended
	Mar. 31, 2018	May 10, 2018
Document and Entity Information
Entity Registrant Name	Timberline Resources Corp
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Entity Central Index Key	0001288750
Current Fiscal Year End Date	--09-30
Entity Common Stock, Shares Outstanding		43,527,819
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	tlrs