This 14.6-mile out-and-back meanders past lodgepole pine, towering peaks, and a waterfall on its way to a backcountry campsite at the foot of the Tetons.

Navigate boulder fields, rocky ridgelines, and seasonal snowfields during this long, challenging ascent of the third-highest peak in the Tetons.

Towering peaks, alpine lakes, and rugged canyons highlight this challenging, 21.7-mile backcountry trek in Grand Teton National Park.

This challenging, 18.1-mile backcountry trek wanders the rugged canyons, alpine lakes, and scree fields of Grand Teton National Park.

This 13.3-mile backcountry trek in Yellowstone National Park travels to a rocky beach (and campsites) in the Grand Canyon of the Yellowstone.

Ascend 2,000 feet in 2.3 miles on the stiff climb to the wind-swept summit of Avalanche Peak, a 10,568-foot mountain with prime views across Yellowstone National Park.

Take a tour of multi-colored hot pools and a crater-like geyser on this easy-going, 0.4-mile boardwalk stroll in Yellowstone's Black Sand Geyser Basin.

Take advantage of the park's quieter winter season on this 9.4-mile snowshoe trek through wooded hills to an expansive plateau with endless snowy views.

Climb to panoramic views of Yellowstone National Park on this 7-mile loop that crests Bunsen Peak and skirts the edge of Sheepeater Canyon.

Explore Yellowstone National Park's lower elevations on a moderate 8-mile loop that circles Garnet Hill, visits the Yellowstone River, and traverses bison-filled grasslands.