Trail Running Calendar Idaho 2025-2026

The Standhope 100 is Idaho’s highest trail race, a challenging 100-mile endurance run held in July 2025. The single-loop course circumnavigates the Pioneer Mountain Range in central Idaho, featuring many hard ascents and high-altitude views. Runners navigate a well-marked trail with 12 fully stocked..

The Standhope Ultra Challenge is a rugged mountain race held in Idaho’s Pioneer Mountains near Ketchum. It offers three challenging distances: a 100-mile ultra with over 23,000 feet of climbing, a 60K featuring 9,000 feet of elevation gain over 37.2 miles, and a 30K covering the latter half of the 6..

The Owyhee 50/50 Night Run is a nighttime ultramarathon event held near Homedale, Idaho, featuring 50-mile and 50-kilometer distances. The race starts at 8 PM and runs through the night, with runners finishing the following morning. The course is an out-and-back route on dirt county roads, Bureau of..

The Boise Front Trail Festival is a two-day trail running event held at Bogus Basin Ski Resort in Boise, Idaho. It features a unique Hill Climb Challenge on Friday evening, an uphill-only 2-mile race finishing at Shafer Butte summit, offering stunning views and a vertical challenge. On Saturday, run..

The Farm Life 5k Trail Run takes place at the Bonneville County Fairgrounds in Idaho Falls, ID. This farm-themed event features a fun, flat 5k course that winds around corrals, horse barns, and fields, providing a unique rural running experience. Multiple water stations are available along the route..

The PRR Summer Series - Warnick 10k is a scenic trail run held on Moscow Mountain in Idaho. The course is a roughly 6-mile loop starting and finishing at the Warnick Road parking area, featuring over 800 feet of elevation gain with varied terrain including climbs and descents. Runners follow trails..

The Outlaw Trail Ultra Half Marathon is a scenic trail running event held near Hansen, Idaho, in the Sawtooth National Forest's Rock Creek Recreation Area. The race covers approximately 14.5 miles, slightly longer than a traditional half marathon, featuring a mostly gradual downhill course. Starting..

The Inkom Last Man Standing 1.1 is a unique endurance running event held on a private 1.1-mile loop located at the Solomon family's property in Inkom, Idaho, home to Lavender Lane Lavender Farm and Leapknot Coffee Roasters. The course features a challenging 240-foot elevation gain per loop, with rol..

The Harriman 25K/50K Trail Run, held annually at Harriman State Park near Island Park, Idaho, offers a scenic and intimate 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 throug..

The Foothills XC12K is a cross-country running event held in Boise, Idaho, at the Military Reserve located at 750 Mountain Cove Road. Scheduled for August 23, 2025, the race offers two distances: a 12K and a 5K. Participants will experience challenging trails set against the scenic backdrop of the B..

The Payette Lake Run, held in McCall, Idaho, offers three race distances: a 30K, 14K, and 5K. The 30K course is a full loop around scenic Payette Lake, while the 14K starts near North Beach and the 5K near Little Lake on Lick Creek Road. All races begin and end at Brown Park in downtown McCall, prov..

If You're Not First You're Last is a unique endurance running event held in Eagle, Idaho, featuring a challenging 4.167-mile loop course. The race tests participants' stamina and grit rather than speed, as runners must complete each loop within an hour and return to the starting corral at the top of..

The Pocatello Fall Ultra, held in Pocatello, Idaho, is a challenging trail running event featuring multiple race distances: 100K, 60K, 20K, and a kids' race. The ultra courses boast significant elevation gains, with the 100K offering over 10,000 feet and more than 45 miles of single-track trails on..

The RIM2RIM RACE4HOMES is a challenging 7.5-mile running and walking event held in Twin Falls, Idaho, featuring the scenic but demanding terrain of the Snake River Canyon. Starting at Blue Lakes Country Club, participants climb out of the canyon, cross the iconic Perrine Bridge, pass the Visitors Ce..

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 2025 event, marking its 14th year, features a 100-mile race beginning Saturday and a 20-mile race on Sunday. Known for its r..

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 backdrop of Sun Valley's vibrant fall colors. The event features two main races: a Half Marathon (13.1 miles) with a 2,372 ft elevation gain reaching up to 7,600 ft, and a 55 km..

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 ultramarathon. The courses primarily traverse technical single-track trails along the scenic spine of Moscow Mountain, with some fast loggin..

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 combining three races. Set in the scenic Ponderosa State Park, the course includes a 6.79-mile loop through beaut..