Trail Running Calendar Colorado 2026-2027

Experience 13.1 miles of singletrack trails and hills in the Highlands Ranch Backcountry Wilderness Area. Enjoy custom medals and a post race pancake breakfast while competing for cash prizes in various categories.

Timed 6-, 12- and 24-hour running and relay events on a certified 1.0002 mile dirt loop at Colorado Youth Outdoors Swift Ponds in Fort Collins, with full-service aid every lap and locker-style lodge support nearby.

Trail races at Starsmore Visitor & Nature Center on November 8, 2026, with chip-timed 4-mile and untimed 2.5-mile courses on Columbine Trail; proceeds support Friends of Cheyenne Cañon and leashed pets are allowed on the trail.

A trail running event in Louisville, CO on November 14 offering a half marathon, 10K and 5K on out-and-back dirt courses with several aid stations, designated drop bag area, limited onsite parking and family-friendly post-race festivities.

A four-race trail series in city and county parks with increasing distances and varied terrain. The races are chip timed and overall awards require completion of all four events.

A late November trail event in Colorado Springs with 50k, half marathon and 10k options across historic High Drive and Gold Camp Road, staffed aid stations, and crew-accessible locations including warm food at Cheyenne Canon.

A four-race trail series in city and county parks with increasing distances and varied terrain. The races are chip timed and overall awards require completion of all four events.

The Sawmill Trail Runs will take place in Conifer on Saturday 5 December 2026. You can run 50 kilometers.

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.

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.

A three day trail running festival in Fruita, Colorado with four distances across desert singletrack, mesas, and river views. The 100 KM can earn a Western States qualifier and several races award UTMB Index points.

Long-distance races along the Poudre River Trail offering 50 mile and 100 mile solo and relay options, with the 50 mile point-to-point finishing at Island Grove in Greeley. Supported course with aid stations and exchange zones.

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.

A multi-distance trail event in Greenland Open Space near Larkspur, Colorado offering 50K, 25K, 8M and 4M on dirt double-track trails with aid stations, looped courses, drop-bag access and a virtual race option.

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 endurance event near Mack, Colorado, where runners complete five zero-pavement routes per journey totaling about 55 miles. Crewed and uncrewed divisions are offered and pacers are not permitted.

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.

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.

Weekend of obstacle races at Fort Carson with Sprint, Super, Beast and Ultra distances, plus kids races and spectator access. The courses use high elevation terrain with steep climbs and rugged trails.