Without a doubt, the most spectacular single range in the Rocky Mountains is the Teton Range. They, and the Grand Teton National Park, draw some 3 million visitors per year - mostly in summer. And that is just part of the story: the Greater Yellowstone Ecosystem (GYE), which surrounds the entire area (also entering Montana and Idaho, is home also to the nation's first national park - Yellowstone (of Yogi Bear fame) and myriad other wildlife reserves and protected places. The area is know as being the 'wildest' in terms of open land and original species preservation outside of Alaska.