Grand Teton National Park

A park that was actually established twice (the original 1929 park was formed to protect the mountain peaks and the lakes near the base; much of the adjacent valley floor was included in the boundaries established in 1950), Grand Teton Park encompasses approximately 310,000 acres of land including all 40 miles of the Teton Range and sections of the Jackson Hole Valley.
Located only 10 miles south of Yellowstone National Park (it takes a little more than an hour to travel through the park from the southern boundary to Yellowstone, not including stops), Grand Teton National Park is a lesser-known but no-less spectacular neighbor to Yellowstone. Visitors to Grand Teton National Park can enjoy a myriad of activities including fishing, hiking, camping, climbing, boating on Jenny Lake, rafting the Snake River, or viewing wildlife like moose, elk, bald eagles, gray wolves, bison and black and grizzly bears.

Practical Info:

Grand Teton National Park is open year-round, though some facilities and roads close in the winter. A $25 per vehicle entrance fee gets seven days of access to both Grand Teton and Yellowstone national parks. Bikers and hikers can enter the park for $12 per person for seven days; motorcyclists will pay a $20 fee. The park entrance gates do not close; hours vary for park concessions, facilities and visitor centers.