Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 146 exciting trail runs across the region. Find your next trail run in Colorado below and join the trail community at these great events!
May 2027
A trail race weekend near Rampart Reservoir and Rampart Range in Colorado Springs offering multiple distances from 15K to 55 miles, with point-to-point and loop options.
Trail races at YMCA of the Rockies on May 22, 2027 featuring 10K, 25K, and a 50K with 6,000 feet of gain on mostly runnable singletrack.
Trail races at Farish Recreation Area in Woodland Park, CO feature a Half Marathon, 10K, 5K and a free 1 mile kids run, with awards and packet pickup options.
Two days of Spartan obstacle races at Fort Carson on high elevation terrain, offering Sprint, Super, Beast, Ultra and kids race formats.
A trail race in Buena Vista on May 30, 2027 offering marathon, half-marathon and 9k distances at the South Main Town Square. The event coincides with CKS Paddlefest and donates to several local nonprofit organizations.
Trail ultramarathon in Buffalo Creek, Colorado offering 50 Mile and 50K on soft singletrack with aid stations, limited crew access and live tracking.
June 2027
A multi day running festival in Eaton Colorado featuring races from 7K to 100 miles, relays, a ruck event, virtual options, glamping, sauna and on site entertainment.
Trail running at Barr Lake State Park in Brighton CO on June 5 2027 with distances from 5K to 50K on dirt loops and live split tracking.
A weekend trail running festival in Divide, Colorado with 100 mile, 100k, 50k and 25k races on smooth single and double track trails.
A mixed gravel-bike and trail-running festival in Lyons, Colorado on June 6, 2027, featuring races from 100K to 5 miles plus relays, BMX, camping and a concert.
Trail races at Granby Ranch Resort in Colorado on June 12, 2027, across multiple distances including a 14-hour Elevation Challenge scored by total elevation climbed. The event uses mountain single-track, aid stations, drop bags, and has a 250 runner..
A three-day Leadville camp in June 2027 that guides runners over key sections of the Leadville Trail 100 Run with day and night group runs and course briefings.
A multi distance race weekend in Estes Park featuring marathon and half marathon point to point courses, a limited trail descent, a 5 mile race, kids events and virtual options.
San Juan Solstice 50 Mile Run is a 50 mile ultramarathon scheduled for June 20, 2026, with lottery registration open from January 15 to January 31.
Trail races in Colorado Springs offering 100K, 50K and 35K courses from Rock Ledge Ranch through North Cheyenne Cañon and Pike National Forest.
A three-day high-elevation dirt festival in Alma Colorado featuring mountain bike races, off-road duathlon, trail runs, family kids races and on-site camping.
A summer trail race at Lory State Park offering 10 mile, 5 mile and 5K courses with marked routes, aid stations, biodegradable cups, and post-race food and beer.
Trail marathon and 15.4 mile Heavy Half through Leadville mining country, topping Mosquito Pass at 13,185 feet; registration opens January 7, 2027.
An overnight full moon trail event in Highlands Ranch offering 12 hour solo and team relays on a 10.3 mile loop with aid stations and required headlamps.