Trail Running Calendar Colorado 2026-2027

A mountain trail race at Arapahoe Basin on September 5, 2026 covering *9.4 miles* and *2,211 ft* of ascent, with Sport, Expert and Pro divisions, a 700 runner cap, on course aid stations and category prizes.

A multi-distance trail event in Creede, Colorado, the Creede Mountain Run routes runners from the historic town into high-elevation mountain terrain with alpine single track, mining-era sites, and enforced cutoffs for the 22 Mile and 50K co..

A trail race starting at the Rabbit Ears Pass summit near Steamboat Springs at about 10,000 ft, offered as a listed 10 km (actual 6.8 miles) and a 5 km option. Proceeds support Steamboat Nordic and entries are limited by a USFS permit.

A remembrance running event in Longmont, Colorado on September 11 and 12, 2026 featuring loop course races from 5K to 100 miles and a virtual option. The event includes aid stations, participant shirts, finisher awards, and on site food for..

Ned Ned Run in Nederland Colorado features a trail Half Marathon, a 10K on dirt roads and single track, and a 5K out and back near Old Town. The event is family friendly, allows leashed dogs in the 5K, and encourages costumes.

Snow Mountain Ranch in Granby Colorado features trail races from 5K to 50KM across dirt trails with varied elevation and mountain views. Loop courses include aid stations, drop bag access, onsite lodging, and a pacer option for the 50KM fin..

A 13.5 mile trail half around Lory State Park near Fort Collins featuring about 2,000 feet of climb, mainly singletrack terrain and a free one mile kids race. Post race breakfast and awards are held at the Soldier Canyon Picnic Area.

Point-to-point trail race in Empire, Colorado with 50K and 22K options, both on dirt single-track and reaching above 13,000 feet. Prior ultra experience is required for the 50K and cut-off times are enforced.

The Trail Sisters Women's Half Marathon will take place in Buena Vista on Saturday 12 September 2026. You can run between 10 and 21 kilometers.

A 13 mile mountain trail run in Ouray, Colorado that funds the Ouray School; the course starts and ends at Fellin Park, features limited cup water stations, packet pickup before race day, and awards for top finishers.

Run Rabbit Run in Steamboat Springs offers a limited-field 100 mile race with Hares and Tortoises and a 50 mile race, backed by a substantial prize pool and significant charitable donations.

Take on the scenic trails of North Table Mountain Park in Golden and support BeyondHome’s work helping families build stable, self sufficient futures. Enjoy community vibes, stunning views, and artisan awards for top finishers.

Test yourself on the iconic Pikes Peak Ascent, a 13.3 mile run from Manitou Springs to the summit with breathtaking views and huge elevation gain. A bucket list challenge for runners who crave high altitude adventure.

A 26.2 mile out-and-back marathon from Manitou Springs to the summit of Pikes Peak and back, held on September 20, 2026, with 7,834 ft of elevation gain and open to runners aged 16 and older.

A three day trail event at Ben Delatour Scout Ranch near Red Feather Lakes featuring 50 Mile, 50K and Half Marathon courses across mostly singletrack with significant elevation gain, camp facilities and stocked aid stations.

A multi-distance trail festival in the Sangre de Cristo Mountains near Westcliffe, Colorado offering 8 Mile, 27k, 50k, 50 Mile, 100k and 100 Mile races. Courses follow the Rainbow Trail and include camping, aid stations and drop-bag options..

A trail ultramarathon in Crested Butte, Colorado offering 35K, 55K and 50 mile courses through Gunnison National Forest, with cupless aid stations, downloadable course files, and on site packet pickup at the community school.

A trail running event in Buena Vista, Colorado offering 50k and 30k courses on high elevation singletrack and forest roads with views of the Collegiate Peaks. The event is organized by Freestone Endurance and hosted alongside 14er Fest.

A 24-hour loop endurance run on a 0.82 mile course atop the Palmer Divide at 7,240 feet. Prizes are awarded by distance and the first ten runners to reach 100 miles receive a buckle; a portion of registration fees supports local parks.

The Estes Epic will take place in Estes Park from Saturday 26 September 2026 to Sunday 27 September 2026. You can run between 21 and 50 kilometers.