Glacier National Park, Montana

You’ll find a regular hiker’s heaven here, with more than 730 miles of marked trails. In fact, more than half of the people who enter the park are there to set off on foot and explore.

The park gets its name from the huge glaciers that helped to shape the park’s rock formations 10,000 years ago. But if you want to see glaciers there as you walk the park, you’d better hurry …

In 1850, the park had 150 glaciers, but today there are only 26 remaining. Because of climate change, those are predicted to be gone by the year 2020.