The same natural forces that made Yellowstone National Park so scenic made Island Park similarly beautiful. Once you leave the agricultural Upper Snake River Valley outside of Ashton, you´ll actually be driving up the edge of an ancient caldera, a collapsed volcano. Once you´re on top, the landscape is relatively flat with rolling hills and surrounded by mountains. The former caldera is 18 miles long, 23 miles wide and is marked by a 1,200 foot scarp on the south and west rims.

The result is a country just made for relaxation and recreation. The heart of Island Park is Harriman State Park, 4,330 acres of pristine forest land and high-country meadows. The world-famous fly-fishing stream, Henry´s Fork on the Snake River, winds through the meadows of Harriman. Located in the center of a 16,000 acre wildlife refuge, the park is known for its resident population of trumpeter swans and other numerous waterfowl. In winter, cross-country ski trails are groomed through the park. Island Park is 18 miles north of Ashton and 33 miles southeast of West Yellowstone, Montana.