Lewis and Clark Caverns Private Tour & photo shoot December 20, 2018April 10, 2016 This content is for NRMG members only.Log In Register Related posts: Searching for Caves in the Northern Rocky Mountains Lost Creek Siphon: The Carl Froslie Experience Poia Lake Cave: Poia Lake Anastomosis Poia Lake Cave 9/18/15 Big Snowy Mountains: A Little Walk Across the Big Snowies Lewis and Clark Caverns: Wild tour