Harriman 25K/50K Trail Run

The Harriman 25K/50K Trail Run, held annually at Harriman State Park near Island Park, Idaho, offers a scenic and well-curated trail running experience. The event features three distances: an 8.1-mile race, a 25K, and a 50K (two laps of the 25K course). Runners enjoy beautiful single-track trails through forests and meadows with stunning views of the Teton Mountains and local valleys, plus opportunities to see wildlife like Trumpeter swans.

Aid stations provide a variety of snacks and drinks, and the race limits participants to maintain an uncrowded, wilderness atmosphere. Post-race festivities include meals and socializing by the Henry’s Fork River. The race emphasizes environmental care and respectful trail use. Visit the organization's website for the most recent information.