Trail Running Calendar Idaho 2025-2026

The PRR Summer Series - Warnick 10k is a scenic trail running event taking place on Moscow Mountain. This 6-mile loop features a challenging course with over 800 feet of elevation gain, making it an exciting experience for participants. The run starts and finishes at the Warnick Road parking area, a..

The Inkom Last Man Standing 1.1 is an exciting running event set on a scenic 1.1-mile loop in Inkom, Idaho, featuring an elevation gain of 240 feet. Inspired by Nate Solomon's morning runs, this unique race challenges participants to complete each loop within 20 minutes, with the clock restarting af..

The Foothills XC12K is an exciting cross-country running event scheduled for August 23, 2025, in Boise, Idaho. Participants can choose between two courses: a challenging 12K and a shorter 5K, both set against the stunning backdrop of the Boise Foothills. The race starts at the Military Reserve, offe..

The Harriman 25K/50K Trail Run, scheduled for August 23, 2025, is a premier trail running event held at Harriman State Park near Island Park, Idaho. Celebrating its eighth year, the race offers a unique experience for both seasoned and novice runners, featuring meticulously designed courses that sho..

The Payette Lake Run is an exciting running event taking place in McCall, Idaho, featuring three race distances: 30K, 14K, and 5K. The 30K race encompasses a full loop around Payette Lake, while the 14K and 5K races start at designated locations near the lake. All races begin and end at Brown Park i..

"If You're Not First You're Last" is a unique running event held in Eagle, ID, featuring a challenging Last Man Standing format. Participants must complete a 4.167-mile loop within an hour, returning to the starting corral each hour until only one runner remains. This race emphasizes endurance and g..

The Pocatello Fall Ultra is an exciting running event held 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 scenic single-track trails. The event offers chip..

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 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. IMTUF is recognized as a qualifier for prest..

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 Almo, Idaho. Participants will navigate a challenging cross-country course primarily composed of single-track trails, including the demanding Log Run, w..

The Bogus 50/50 is an exciting trail running event taking place in Boise, Idaho, featuring three challenging courses: a 50 Mile, a 50K, and a 27K. All races start and finish at the Fort Boise parking lot, showcasing the stunning trails of the Boise foothills. The 50 Mile course includes significant..

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

Moscow Mountain Madness is an exciting running event scheduled for October 5, 2025, in Moscow, Idaho. Participants can choose from three challenging distances: a 50K, a half marathon (13.1 miles), and a 5-mile race. The courses primarily feature technical single-track trails, offering stunning views..

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 new 50/50 challenge, which involves running two 50K races over the weekend. This event not only promotes fitnes..

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,..

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..