Harriman State Park

Hiking & Backpacking in Island Park
Visit the website
Hiking & Backpacking icon.

Harriman State Park lies within a 16,000-acre wildlife refuge in the Greater Yellowstone Ecosystem. The park is known throughout the Northwest for its beautiful scenery and abundance of wildlife. Explore over 22 miles of hiking, mountain biking, and horseback riding trails that weave alongside riverbanks, meadows, and lush evergreen forests. If you plan on taking a multi-day trip here, be sure to bring your fishing pole, some of the best fly-fishing waters in the lower 48 flow right through Harriman State Park. If you’re bringing the kids, make sure you pack binoculars, as moose, elk and Trumpeter swans, the world’s largest waterfowl species, are commonly spotted here.

Things To Know

  • Entrance fee to all Idaho State Parks is $5 per vehicle.
  • During winter, dogs and their owners are encouraged to use the Harriman Hounds Trail, which can be accessed via the Visitor Center parking lot. Other than on the Harriman Hounds Trail, pets are allowed in the parking lot only and must be on a leash.
  • When hiking in Harriman State Park, remember trails are multi-use (hiking, biking and equestrian use) and hikers are asked to yield to equestrians.
  • For those interested in winter activities, the park offers a premier Nordic ski area with over 24-miles of groomed trails for skate and classic skiing, snowshoeing and fat bike riding.