Road Trips Gateway Towns Gardiner, Mont. at Yellowstone’s North Entrance “YS-Boiling-River-Swimming_NPSJimPeaco_680” "Yellowstone's Boiling River Swimming Area. Photo by NPS Jim Peaco" 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