Things to Do and See Wildlife What to Do If You Encounter a Bear at Yellowstone Grizzly bear crossing a creek in Yellowstone Grizzly bear crossing a creek in Yellowstone 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: Allen Thomas