Basic Park Information History and Culture 100 Years in Yellowstone – Then and Now “YS-ranger-feeding-marmot-1930s_NPS_612” "A Yellowstone park ranger feeding a marmot in the 1930s. Photo courtesy NPS | National Park Service" 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: National Park Service