Lewis and Clark Caverns offtrail adventure December 21, 2018March 27, 2015 This content is for NRMG members only.Log In Register Related posts: Searching for Caves in the Northern Rocky Mountains Barton Creek, Panti Pit: Amblypygis, Mennonites, and Panti Raids. Upper Kane Cave: Big Horn Cavern Or Bust Lillyguard: The Three Halves of Lillyguard Medical Emergency at Lillyguard Lewis and Clark Caverns: Wild tour