Trail Running Calendar Colorado 2026-2027

Experience a snowshoe running event at the Snow Mountain Ranch YMCA in Colorado. Choose from 5k, 25k, or 50k distances on groomed trails and singletrack with a mandatory snowshoe requirement.

A multi day trail running festival in Fruita, Colorado featuring four distances, desert singletrack and vistas of the Colorado River. The 100 KM offers a Western States qualifier and several races award UTMB Index running stones.

Experience an exclusive trail race at the private Sylvan Dale Guest Ranch in Loveland. Choose from 5K and 10K Friday evening runs or endurance challenges ranging from 4 to 12 hours on Saturday.

Mountain Ridge Trail Race in Highlands Ranch Colorado offers multiple trail distances on mostly dirt and single track along the Douglas County East West Regional Trail. Rolling hills, aid stations on longer courses, drop bags and live split..

Explore Northern Colorado on the Poudre River Trail. This ultra offers 50 and 100-mile options, both for solo runners and relay teams. The unique 100-mile format combines a race day event with a virtual segment.

Discover the technical singletrack and sandstone bluffs of Palmer Park in Colorado Springs. This scenic event offers distances from 5K to 50K with stunning views of Pikes Peak and the city below.

Join the Durango Running Club for a 5K fun run and walk along the Animas River Trail. This zero waste event supports immigrant services and kicks off the local Earth Day festival and parade.

The Great Western Trail Race, a BOLDERBoulder qualifier in Severance, Colorado, is not scheduled for 2026 but may return. It has featured 5k, 10k, half marathon, and kids run distances. The event supports local community foundations and non..

A trail race weekend at Royal Gorge Ranch & Resort in Cañon City, CO offering multiple distances along the gorge rim with aid stations, drop bags, camping and same-course bike rides the following day.

Falcon 50 at the USAF Academy in Colorado Springs offers trail and road races including a 50 mile ultra. The event is open to DoD ID cardholders and online registration closes April 18.

Trail races at Greenland Open Space in Larkspur, Colorado offer 4 mile, 8 mile, 25K and 50K distances on dirt double-track trails with aid stations and championship designation for the 50K.

Niwot's Challenge is an invitation only, navigation focused ultradistance trial near Sedalia, Colorado, emphasizing off trail travel, limited aid, and self reliance across options from about 24 to 100 miles.

Experience the red rocks of Garden of the Gods Park in Colorado Springs during this traffic free event. Choose between road and trail options ranging from 5K to 9.5 miles with stunning views of Pikes Peak.

Collegiate Peaks Trail Run in Buena Vista, Colorado offers 25-mile and 50-mile loop options on single-track and jeep trails. Each loop starts near 8,000 feet and includes over 3,500 feet of elevation gain and loss.

Experience the 45th annual run along the scenic High Line Canal in Centennial. Enjoy chip timed 5K or 10K races followed by a pancake breakfast and beer garden.

A 150 hour timed ultra near Mack, Colorado with five zero pavement routes per Journey and separate crewed and uncrewed divisions. Runners must complete at least four Journeys to place.

Join the Aurora community for an untimed 1k fun run or a timed 5k race ending with an optional muddy obstacle course. This rain or shine event welcomes runners and walkers of all ages.

Experience a women focused trail event at Cheyenne Mountain State Park. Choose from several distances ranging from 4 miles to 50K featuring winding singletrack and pine shaded canyons in Colorado Springs.

Experience a weekend of desert backcountry racing in Fruita with trail running, mountain biking, and gravel events. Join the community at 18 Road for competitive races, skills clinics, and outdoor festivities.

Experience the rugged beauty of the Rocky Mountain foothills in Fort Collins with a 25 or 50 mile trail race through Lory State Park and Horsetooth Mountain Park featuring significant vertical gain and scenic ridgeline views.