Trail Running Calendar Colorado 2026-2027

Challengers tackle a 6 mile climb gaining 2000 feet of elevation to reach the South Rim of the Black Canyon. Choose between a timed run or a scenic walk ending with a mountain breakfast and park views.

Experience the beauty of the Roaring Fork Valley with a point-to-point trail race from Carbondale to Basalt. Choose between 10-mile and 28k distances featuring iconic single track trails and a festive finish at Rock Bottom Ranch.

Samson's Revenge is a trail race at the YMCA of the Rockies in Estes Park offering 50k, 25k and 10k options. The course uses a roughly 10 km loop with a prominent Bible Point ascent and two aid stations.

The Farish Trail Race takes place on May 23, 2026 at the Farish Recreation Area in Woodland Park, Colorado. Participants can run a half marathon, 10K, 5K, or a free kids' one-mile event. The first 200 finishers get a special hat.

Test your endurance at this Golden Colorado event following the classic backyard format with 4.17 mile laps every hour. Support the Sun Valley Kitchen and Community Center while pushing for your personal best distance.

Spirit Trail Race in Buena Vista on May 24, 2026 offers marathon, half marathon and a 9k with start and finish at South Main Town Square near the Surf Hotel; proceeds support local outdoor and community groups.

A Memorial Day trail event in New Castle, Colorado, honoring a fallen hero with riverfront routes. Options include 3.5 km and 7.7 km courses with both in person and virtual entries.

Obstacle course weekend at Fort Carson near the Rocky Mountains, with Sprint 5K, Super 10K, Beast 21K and Ultra 50K races plus kids events and an obstacle workshop. The high elevation course features steep climbs, rugged trails and multiple..

A weekend running festival in Eaton, Colorado offering distances from 7K to 100 miles, relay teams and 36 hour options on a 2 mile groomed dirt loop, with on-site camping, glamping and amenities such as sauna, cold plunge and aid stations.

Trail ultramarathon near Buffalo Creek, Colorado offering 50 mile and 50K on soft surface singletrack with short double track sections. Part of the proceeds support the North Fork Volunteer Fire Department.

A last-person-standing ultra on Durango's Spurline trails. Run a 4.17-mile loop every hour until only one runner remains. All proceeds support local trail building and maintenance.

A 20K run clockwise around Turquoise Lake near Leadville, CO, mixing 6.5 miles of hilly paved road with 5.5 miles of single track trail, with proceeds supporting Leadville youth athletics and a nominal day use parking fee.

A 5k trail race through the rolling hills of Elk Meadow Park in Evergreen, Colorado, with vendor tents, rec trailer activities and refreshments. The course is cup free and has no aid stations, with marshals on course.

A 5K trail run at the Leadville National Fish Hatchery with a cross country style route through subalpine forest around Evergreen Lakes and lower Rock Creek. Adults $15; youth 17 and under free.

A Parker, CO trail event with a Dipsea style staggered start, a rolling, partly technical 10k and a kids 1 mile. No race day registration; volunteers may race for free and a top-10 podium and awards are given.

Six trail races across Summit County, Colorado, in summer 2026. Series registration includes long and short course options with adult, youth, and non binary categories and events at multiple Summit County trail heads.

A weekend of solo trail races in Snowmass Village, Colorado on June 5-6, 2026 featuring a 6.6 mile Red Loop and timed 6 hour and 24 hour ultras with unlimited loops, plus Ragnar Village camping and festival amenities.

A team trail relay in Snowmass Village on June 5-6, 2026 featuring mountain loops, camping at Ragnar Village, and team formats for four or eight runners. The course totals 120 miles with significant elevation gain and weekend on site amenit..

Trail races at Granby Ranch Resort in Colorado offer multiple distances including a 14 hour Elevation Challenge based on completed loops. The combined field is capped at 250 and the event includes aid stations, drop bag options, and on-site..

Experience smooth single track trails and sweeping views of Pikes Peak at the Great Divide Ultra. Choose from distances ranging up to 100 miles on a scenic looped course through the meadows of Mueller State Park.