Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 147 exciting trail runs across the region. Find your next trail run in Colorado below and join the trail community at these great events!
November 2026
A winter trail event in Colorado Springs offering 50k, half marathon, and 10k courses that start at Bear Creek Regional Park. Trails include historic High Drive and Gold Camp Road with stocked aid stations and crew accessible points.
Celebrate the holiday with a scenic run in Buena Vista. Choose between a standard 5K race or a free 1 mile family fun run suited for all participants in Colorado.
December 2026
Limited to 40 runners on the Thumb Open Space trail in Estes Park, participants repeat 2 km laps with 540 ft gain and collect poker chips to record ascents.
February 2027
A winter trail running weekend at Cheyenne Mountain State Park near Colorado Springs, featuring timed ultra formats and fixed distance races on multi loop courses with central aid at the loop start and finish.
A Nordic ski event circling Gothic Mountain with competitive 23.5 mile and recreational 17.85 mile courses, run as a fundraiser by Crested Butte Nordic.
March 2027
Trail marathon, half marathon, a 2 mile race and a kids 400 meter run take place in Salida CO on March 13 2027, on dirt roads and narrow single track at 7000 to 9000 feet, with limited entries and local charity support.
April 2027
Three days of trail races in Fruita, Colorado with four distances, desert singletrack views, and qualifying opportunities for UTMB World Series and Western States.
A long-distance event on April 11, 2027 along the Poudre River Trail offering 50- and 100-mile solo and relay options through Bellvue, Fort Collins, Timnath, Windsor and Greeley.
Rattler Trail Race in Palmer Park, Colorado Springs on April 17, 2027 offers 5K, 10K, 25K and a 50K two loop course on singletrack with sandstone bluffs, technical sections and views of the city and Pikes Peak.
May 2027
Trail races at Greenland Open Space near Larkspur offer four dirt-trail distances with looped courses, aid stations, timing, and awards.
A road and trail running event in Garden of the Gods Park on May 1, 2027 offering 5K, 5 mile, and a 9.5 mile option with closed roads, multiple aid stations, and views of the park's iconic rock formations.
A 150-hour timed ultra in Mack, Colorado featuring five off-pavement routes totaling about 55 miles per journey and separate crewed and uncrewed divisions.
A women focused trail running event at Cheyenne Mountain State Park on May 8, 2027 offering distances from 4 mile to 50K across limestone, singletrack and ridgelines, with cupless aid stations and race packet pickup the day before.
Trail races near Fort Collins offering 25 and 50 mile options on mostly singletrack through Lory State Park and Horsetooth Mountain Park, featuring about 5,500 ft or 11,000 ft of vertical gain, staffed aid stations, and marked trails.
A chip-timed 5k at Colterris Winery in Palisade, Colorado, with a two-lap cross country course, race swag including a collapsible wine glass and finisher medal, and a charity partnership with RiversEdge West.
Trail races at Mueller State Park from 10k to marathon plus two 12 hour timed events that use colored ball draws to set loop sequences. All courses are single and double track with no pavement and feature an aid station.
A Spartan obstacle race weekend at Fort Carson, Colorado, featuring Sprint, Super, Beast and Ultra distances plus kids races on high-elevation, rugged trails.
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.
June 2027
A multi-distance running festival in Eaton, Colorado on June 5–6, 2027 offering races from 7K to 100 miles, relay and virtual options on a 2 mile groomed dirt loop with aid stations, camping and glamping.