I have lived in south eastern idaho for about 3 years now and have not hunted yet. It is March 7, 2013, and I wanted to know if I can still purchase and hunt mountain line in unit 73?


You can purchase a mountain lion tag for that hunt at any time.  It is a general season hunt so tags are available for sale for 2013.
The current season information is copied below.  There will also be a season next fall and your tag will  be valid through December 2013 (unless you harvest before then).

General Any Weapon

Regular Tag
Either-sex Mountain Lion
Any Weapon
Unit 73³

Answered on: 
Friday, March 8, 2013 - 1:52 PM MST