Hotels-live.com - Yearling sheep crowd a trail as they climb into the Gravelly Mountains for summer pasture above Montana's Madison Valley. iPhone photo by David Guttenfelder @dguttenfelder on assignment for @natgeo and @natgeoparks in the Greater Yellows

Hotels-live.com - Yearling sheep crowd a trail as they climb into the Gravelly Mountains for summer pasture above Montana's Madison Valley. iPhone photo by David Guttenfelder @dguttenfelder on assignment for @natgeo and @natgeoparks in the Greater Yellowstone Ecosystem. @Hotelslive by natgeo instagram.com/p/rG5iVJoVdT/ Follow #Instagram @Hotelspaschers instagram.com/hotelspaschers and @Voyageslive #Twitter #TeamFollowBack #Natgeo #Voyage #Travel #TeamFollowBack #TFB #FollowTrick www.facebook.com/125048940862168/photos/a.801751693191886... via Hotels-live.com www.facebook.com/pages/p/125048940862168 via http://flic.kr/p/owY9iE