Trail Running Calendar Idaho 2025-2026

The Foothills XC12K is an exciting cross-country running event scheduled for August 23, 2025, in Boise, Idaho. Participants can choose between a challenging 12K or a 5K course, both set against the stunning backdrop of the Boise Foothills. The race begins at the Military Reserve and promises a commu..

The RIM2RIM RACE4HOMES is a popular running event held in Twin Falls, Idaho, featuring a challenging 7.5-mile course through the scenic Snake River Canyon. Participants can choose from several events, including the RIM2RIM RUN, RIM2RIM WALK, 1/2 RIM RACE, and a virtual race option. The race begins a..

The Pocatello Fall Ultra is an exciting running event taking place in Pocatello, Idaho, featuring multiple race distances including 100K, 60K, and a 15-20 mile option. Participants can expect challenging courses with significant elevation gains, primarily on single-track trails. The event offers chi..

The Idaho Mountain Trail Ultra Festival (IMTUF 100) is an annual ultra-running event held in McCall, Idaho, featuring a challenging 100-mile race and a 20-mile race. Scheduled for September 20-21, 2025, the event starts and finishes at Jug Mountain Ranch, offering participants a rugged mountain adve..

Race the Rocks is an exhilarating 50K mountain race set in the stunning landscapes of City of Rocks National Reserve and Castle Rocks State Park in Idaho. Participants will navigate a challenging cross-country course primarily composed of single-track trails, including the demanding Log Run, which f..

The Bogus 50/50 is a trail running event featuring three distances: a 50 Mile, a 50K, and a 27K, all starting and finishing at the Fort Boise parking lot. The 50 Mile course showcases some of Boise's best trails, including Dry Creek and Shingle Creek, with an elevation gain of approximately 9000 fee..

"Legends Never Die" is an exciting running event featuring a Half Marathon and a 55K Ultra Marathon, set against the stunning backdrop of Sun Valley, Idaho, on October 4, 2025. Participants will navigate challenging single-track trails with significant elevation gains, reaching high points of 7,600 ..

The Sasquatch Shuffle is an exciting running event taking place in McCall, Idaho, on October 11-12, 2025. Participants can choose from various distances, including a 50K, 30K, 20K, and the unique Triple Threat option, which allows runners to tackle all three distances. The event also features a new ..

The Dizzy Horse Backyard Ultra is a unique ultramarathon event where participants run a 4.167-mile loop every hour until they can no longer continue. Set in a winter desert landscape, the race fosters a fun and social atmosphere among runners. The competition continues until only one runner remains,..