Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 149 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
Family-friendly Thanksgiving 5K in Buena Vista with a mostly flat, stroller friendly course and a free Family Fun Run for kids.
December 2026
A mountain challenge in Estes Park where runners complete 2km laps with 540ft of gain to reach elevation milestones and collect poker chips for rank.
Nighttime uphill race and gondola ride to the Aspen Mountain summit with fundraising, a post summit party, and a virtual option.
Holiday trail runs in Louisville CO with 5k, 10k, a new half marathon, expo pickup, giveaways, family activities, and a visit from Santa.
Celebrate the season with a festive 10K featuring 1,500 feet of climbing and beautiful trail views at the YMCA of the Rockies.
January 2027
A four race winter road series in Colorado Springs with separate short and long series across January and February 2027.
A winter 21.6 mile out and back on closed Rampart Range Road from Highway 67 to Devil's Head with 2,600 feet of climbing and required gear.
A Nordic ski marathon in Crested Butte on January 30, 2027 that runs through downtown alleys into the Nordic trail network, with multiple distances, a costume contest, and a weekend skiathlon.
February 2027
Experience winter trail running at Cheyenne Mountain State Park with views of Pike's Peak. Choose from traditional race distances or unique timed events ranging from 6 to 15 hours across four scenic loops.
Donation based backcountry snowshoe race around Brainard Lake from South Sourdough Trailhead, offered in 18K and 30K, with snowshoes and basic supplies required.
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 and 2 mile run in Salida, Colorado on March 13, 2027, over dirt roads and narrow single track at elevations from 7000 to 9000 feet.
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.
An ultramarathon on the Poudre River Trail through Fort Collins, Timnath, Windsor and Greeley offering 50 mile and 100 mile individual races plus relay team options.
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.