The world's first national park, a sliver of which lies in eastern Idaho, now attracts more than 2.8 million visitors each year. Yellowstone's 3,472 square miles contain hundreds of uncommon sites including 10,000 thermal features and more than 60 species of mammals, 320 species of birds and a half-dozen game fish. Elk, moose and bison can frequently be seen by passing visitors.


Eastern Idaho, Wyoming and Montana