With more than 700 miles of trails that cover two mountain ranges, 130 lakes, and hundreds of historic chalets, Glacier National Park is a hiker's dream. The National Park Service reports that nearly half of the park's visitors go on a hike, where they are likely to view the area's many wild animals which include mountain goat, moose, grizzly and Canadian lynx. It's not bad for driving, either: Going-to-the-Sun Road crosses the Rockies and northern Montana, offering some of the most stunning roadside views in the country.

DON'T MISS: Grinnell Glacier Trail is an 11-mile day hike open during the summer months that skims Swiftcurrent and Josephine Lakes before becoming a 1,600 foot climb up to Grinnell Glacier.