While bison can be seen throughout the park, a large number spend the summer in Lamar Valley. While all of Yellowstone offers chances for great wildlife sightings and photography, the highest concentration of animals can usually be found along the Yellowstone and Lamar river valleys between Mammoth Hot Springs and the Northeast Entrance (an area known as the Northern Range). Remember to keep your distance from wildlife and zoom with your lens, not with your feet!
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