Pigeon Coop Cave: Fun in the Sun! July 13, 2021March 21, 2021 This content is for NRMG members only.Log In Register Related posts: Searching for Caves in the Northern Rocky Mountains Silvertip Mountain 2020 Trip Report Mystery Cave aka Mystic Cave Royce-Green Horse-Four Eared Bat Caves 2015 North Cirque Silvertip Trip Barton Creek, Panti Pit: Amblypygis, Mennonites, and Panti Raids.