Idaho
Idaho Trail Running Calendar 2026-2027
Explore the best trail runs in Idaho for 2026-2027! Our updated list features 25 exciting trail runs across the region. Find your next trail run in Idaho below and join the trail community at these great events!
September 2026
A multi-distance running event in McCall, Idaho on September 6, 2026 featuring 30K, 14K and 5K courses, bus transportation, aid stations, packet pickup, and awards.
A Last Man Standing event in Eagle, Idaho where runners repeat 4.167 mile loops each hour until one competitor outlasts the rest.
A set of organized runs and a walk in Twin Falls along the Snake River Canyon on 12 September 2026, featuring a 7.5 miles rim course across Perrine Bridge and a 3.5 miles downhill half race; no pets or strollers allowed.
A trail event on September 12, 2026 around the volcanic Crater Rings near Mountain Home, Idaho. Options include a 10K loop on a jeep road or a 2.9 mile out and back to the East Crater viewpoint, with hydration stations and awards.
IMTUF 100 is a mountain ultramarathon on September 19-20, 2026 at Jug Mountain Ranch near McCall, Idaho, using the SUPERCOURSE and aimed at experienced mountain runners.
Run, hike, or bike up the mountain in Tamarack to support suicide awareness and mental health recovery. Face a challenging elevation gain while collecting tokens of strength and enjoying views of Valley County.
Experience the extensive single track trails of the Boise Foothills in this premier trail event. Runners can choose between 50 mile, 50K, and 27K distances starting from Fort Boise.
An annual uphill race and hike on Bald Mountain featuring a 3,140 ft vertical climb in 1.86 miles, a free KinderClimb for children, and timed Race and Hike classes.
October 2026
Trail running in Ketchum on October 3, 2026 offering a forested half marathon and a 55K ultra with substantial elevation and alpine terrain.
Trail races on Moscow Mountain with 50K, half marathon and 5 mile options on mostly single-track routes with aid stations and drop bag service.
A 15th annual memorial fun run and family day at Riverstone Park in Coeur d'Alene, raising awareness and funds for NISSA with a scenic 2.5 mile course.
Zombie Mania on October 10, 2026 is a 5 km loop through Nature Park and Eagle Park where volunteers dressed as zombies try to steal runners' flag belts. A separate 1 mile costume run follows the same parks without zombies.
Looped trail races at Ponderosa State Park in McCall, Idaho offering 20k, 30k and 50k options with 6.79 mile loops and proceeds benefiting local trails.
A Halloween themed road run at Massacre Rocks State Park featuring mixed surfaces, costume prizes, campsite rentals, and proceeds benefitting Rockland High School XC.
A Halloween morning trail race in Swan Valley, Idaho featuring a 50K with 6,000 ft gain and a half marathon with 2,700 ft gain.
November 2026
In-person and virtual runs on 11/14/2026 in Boise supporting InspireKidz; in-person is a two-hour loop challenge and virtual runs range from 1 to 26.2 miles.
A Last Man Standing event in Meridian, ID where runners, ruckers, hybrids and walkers complete shrinking timed loops until the clock catches them.
January 2027
Test your endurance in Idaho Falls at this winter backyard ultra. Complete 4.167 miles every hour on a varied terrain course until only one runner remains at the Bonneville County Exhibition Hall.
Experience a winter trail race through the Reynolds Creek gorge and Wilson Peak in Idaho. Choose between 10 mile, 20 mile, or 50k distances featuring up to 6000 feet of elevation gain in the stunning Wilson Creek trail system.
April 2027
Trail races on North Menan Butte in Menan, Idaho featuring volcanic terrain, caldera rim views and distances from 5k to 55k each April.