Trail Running Calendar Idaho 2025-2026

Race the Rocks is a challenging 50K mountain race held in Almo, Idaho, within the scenic City of Rocks National Reserve and Castle Rocks State Park. The course features rugged single-track trails surrounded by towering granite spires up to 1,000 feet high, offering stunning panoramic views. A highli..

The Idaho Mountain Trail Ultra Festival (IMTUF 100) is a challenging mountain ultramarathon held annually near McCall, Idaho, starting and finishing at Jug Mountain Ranch. The 14th edition in 2025 features a 100-mile race beginning Saturday morning and a 20-mile race on Sunday. Known for its rugged,..

The Bogus 50/50 is a trail running event held in Boise, Idaho, featuring three distances: a challenging 50 Mile ultra, a 50K, and a 27K race. All courses start and finish at the Fort Boise parking lot in the lower Boise Foothills, showcasing some of the region's best single-track trails, including D..

Legends Never Die is a challenging trail running event held in Oregon Gulch near Ketchum, Idaho, set against the stunning autumn backdrop of Sun Valley. The event features two main races: a Half Marathon (13.1 miles) with a 2,372 ft elevation gain reaching 7,600 ft, and a 55 km Ultra Marathon (appro..

Moscow Mountain Madness is a challenging trail running event held in Moscow, Idaho, featuring three distances: 5 miles, a half marathon (13.1 miles), and a 50k ultra marathon. The courses primarily follow technical single-track trails along the scenic spine of Moscow Mountain, with some fast logging..

The Sasquatch Shuffle is an annual trail running event held in McCall, Idaho, featuring multiple race distances including 50K, 30K, 20K, a new 50/50 challenge, and a Triple Threat option where participants run three distances over two days. The course consists of a scenic 6.79-mile loop through Pond..

The Dizzy Horse Backyard Ultra is a unique winter ultramarathon held in Idaho Falls, Idaho, featuring a 4.167-mile loop through a diverse course of desert, grass, horse-race tracks, gravel roads, and occasional snow. Participants run one loop every hour until only one runner remains, making it a tes..

The Wilson Creek Frozen 50K is a winter running event set in the picturesque Wilson Creek trail system, located 30 minutes south of Nampa, Idaho. Scheduled for January 24, 2026, this race features three distance options: a challenging 50K, a 20-mile loop with 4,500 feet of elevation gain, and a 10-m..

The Spitfire Ultra Trail Challenge, held in Menan, Idaho, offers runners a unique experience on the North Menan Butte, an extinct volcano formed 10,000 years ago. The event features multiple distances: 55K, 30K, 12K, and 5K, catering to various skill levels. Participants traverse diverse terrain inc..