Road Trips Stops on the Way South Dakota Stops on the Way Custer is South Dakota's Yellowstone “MtRushmore-tunnel-IronMtnRd_FlickrThomasJamesCaldwell_700” "Thomas James Caldwell via Flickr" Share this Facebook Icon Twitter Icon Email Icon Join Yellowstone National Park Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join Yellowstone National Park Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Photo: Thomas James Caldwell via Flickr