In Montana, Glacier National Park stretches to the Canadian border with high-elevation passes and beargrass meadows. Drive Going-to-the-Sun Road to Logan Pass, where you can hike across alpine tundra on the Hidden Lake Overlook Trail. In Nevada, Great Basin National Park sits in the rain shadow of the Sierra. Tour the marble corridors of Lehman Caves, then head up Wheeler Peak Scenic Drive to hike past ancient bristlecone pines and into a glacier-carved basin. In Wyoming, Grand Teton National Park stacks jagged peaks above the Snake River without a foothill in sight. Jenny Lake is a launch point for paddling and hiking. Take the shuttle boat to Hidden Falls and Inspiration Point, or drive to Oxbow Bend at sunrise to spot moose and great blue herons.