Trail Running Calendar Colorado 2026-2027

High altitude trail races in Empire, Colorado offering 50K and 22K point to point courses with significant elevation gain and remote terrain.

Trail Sisters Women's Half Marathon and 10K in Buena Vista, Colorado, feature trail courses through sagebrush and ponderosa pines with views of the Collegiate Peaks, and offer both group and solo participation options.

Trail races on Meadow Mountain in Minturn offering 11K and 5K courses on singletrack and dirt trail, with aid stations, post-race refreshments, and series awards.

Low-key trail running event in Loma, Colorado offering Half Marathon, Marathon (26.2 Miles) and 50 Miler with a flat $50 entry fee. Registration runs April 5 to August 1, and participants may change distance on race day.

Mountain trail and road races in Marble, Colorado featuring a 25K Lead King Loop, an 8 mile Quarry Climb, and a kids 2.5K with proceeds to Marble Charter School.

Two days of trail ultramarathons in Steamboat Springs offering 100 mile and 50 mile distances, limited fields, time cutoffs, and a $100,000 prize purse.

13 mile mountain trail run in Ouray, CO on September 19, 2026; a fundraiser for the Ouray School with cupless water stations and packet pickup before the race.

Trail race fundraiser at North Table Mountain in Golden CO on Sept 19 2026 featuring a 10Mi North Table Loop and a 5Mi Breaking Dawn Fiver.

A 13.32 mile ascent from Manitou Springs to the summit of Pikes Peak with about 7,867 ft of elevation gain on September 19, 2026.

A 5 km fundraiser in Telluride supporting the Telluride Adaptive Sports Program. The downtown route climbs the river trail past Bridal Veil Falls and returns to Elks Park, finishing with live music, free beer and yoga.

Multi distance road and trail races around Beulah, Colorado, including a half marathon through Pueblo Mountain Park. Registration is temporarily closed due to the Aspen Acres Fire.

Experience a 26.2 mile mountain run from Manitou Springs to the summit of Pikes Peak and back. This historic event features over 7800 feet of elevation gain and a 10 hour time limit.

A day of youth and adult cross country races in Aurora, Colorado on September 20, 2026, featuring grass courses with small undulations, a creek crossing, and bale jumps; distances run from 2k youth races up to a 5k open race.

Experience the wild spaces of Northern Colorado with a weekend of trail races ranging from a half marathon to a 50 mile ultra through scenic forests and scout camp trails. Stay on site with available camping and community meals.

A multi distance trail and ultramarathon festival on the Rainbow Trail near Westcliffe, Colorado on September 26 and 27, 2026, featuring races from 8 miles to 100 miles, aid stations, drop bags, camping, and defined crew and volunteer rules..

A mountain ultramarathon in Crested Butte, Colorado on September 26, 2026, offered in 35K, 55K and 50 mile distances. Courses run through Gunnison National Forest with single track trails, alpine meadows, cupless aid stations, and on course..

Experience desert style single track and forest roads with views of the Collegiate Peaks in Buena Vista. Choose between 50k or 30k distances as part of the multi sport 14er Fest.

Tough Mudder Colorado takes place at Fort Carson on September 26, 2026. Runners can choose a 15K with 20+ obstacles or a 5K with 12+ obstacles, with spectator and group options available.

A 24 hour loop endurance run in Palmer Lake, CO on a 0.82 mile course at 7,240 feet, with distance awards and guaranteed buckles for early 100 mile finishers.

A two-day trail and bike event in Estes Park featuring 31-mile bike and run options, a 15-mile heavy half, and a 62-mile duathlon, with rugged trails, significant climbs, and aid stations supporting competitors.