Trail Running Calendar Colorado 2026-2027

Tackle the Kendall Mountain Run in Silverton, Colorado with 12 mile and 11K options up scenic jeep roads to high alpine summits. Big climbs, sweeping views above 13,000 feet and a classic mountain descent await.

Tackle rugged trails near Pikes Peak in the Pikes Peak Ultra, a scenic trail ultramarathon in Colorado Springs with 20K to 50 Mile options, including summit runs on Mt Rosa for the longer distances. Expect big climbs and sweeping views.

Experience high alpine trails and rugged scenery in the Never Summer 100k and 60k from Gould, Colorado, with challenging climbs across ridges, peaks and alpine lakes. Choose 100k, 60k or the Dirty Double for a true mountain ultra adventure.

Creede 100 takes place July 25 to 26, 2026 in Creede, Colorado, inviting runners to tackle a rugged, scenic trail course in national forest country. Full support for crews and pacers makes this an epic team friendly ultramarathon.

Run the trails atop Colorado's Grand Mesa on July 25, 2026 with distances from 30K to 50 miles. Revel in alpine meadows, lakes and technical singletrack, then relax with weekend camping, post race food, beer and finisher awards.

The Summit 200 is a 200 mile loop around Summit County Colorado that climbs into high alpine single track above 12,700 feet. Capped at 100 runners and requiring a prior 100 mile finish, it is a remote, high altitude test of endurance.

Join the Wild West Relay, a 200 mile point to point run across Colorado from Fort Collins to Steamboat Springs, July 31 to August 1, 2026. Teams and solo runners of all sizes welcome for scenic, team driven endurance adventure.

Take on the Sheep Mountain Trail Runs in Fairplay Colorado on August 1 2026 with 50 mile, 50k and half marathon options across high alpine trails. Expect rugged terrain, big mountain views, well stocked aid stations and a finisher award.

Take on the Kennebec Mountain Run, a 15 mile trail with about 3,100 feet of climbing to a high alpine pass. Limited to 150 runners, the grassroots race raises funds for La Plata County Search and Rescue and showcases Colorado scenery.

Take on alpine trails in Aspen Colorado with three distances 50K, marathon and heavy half, all starting at Rio Grande Park on August 1, 2026. Finishers celebrate at the Duck Derby festival with music, food and awards.

Run a scenic mountain 50K or 10K from Winter Park Resort into town with flowing singletrack, aspen groves and views of the Continental Divide. Expect changing high altitude conditions, full aid stations and a finisher award.

The Lory Summer Trail Series will take place in Bellvue from Tuesday 4 August 2026 to Tuesday 25 August 2026. You can run between 5 and 12 kilometers.

The Eltuck Valley 12K Trail Series will take place in Bellvue on Tuesday 4 August 2026. You can run between 5 and 12 kilometers.

High Five 100 in Lake City Colorado on August 7 2026 is a rugged mountain ultra of about 100 miles and 40,000 ft of climbing with five 14er summits. The unmarked, self supported route uses checkpoints for aid and has a 48 hour cutoff.

Run the Rockies Trail in Frisco, CO features 5K to half marathon routes on the scenic Frisco Peninsula with lakeshore finishes and reservoir views. Finishers receive a gift and an afterparty with food, music and beer for 21+.

Emerald Mountain Epic in Steamboat Springs on August 8 and 9, 2026 is a two day mountain bike and trail running weekend on scenic singletrack dirt trails. Race marathon, half or bike distances with a limited field of 500 per day.

The San Juan Softie 100 will take place in Durango on Friday 14 August 2026. You can run 100 miles.

Soak up Rocky Mountain and reservoir views while racing varied distances at the Boulder Rez Marathon. From 10K to the full marathon and relay, enjoy a scenic, mostly flat trail course and a festive finish with a shirt and medal.

Roxborough Ultras features 50K and 50M all trail ultramarathons in Roxborough State Park with sustained climbing, technical terrain, and big elevation gain. August is hot and dry with limited shade and spaced aid stations, so carry water an..

Run the scenic Leadville Trail 10K on August 16, 2026 in historic Leadville, Colorado, tracing the opening miles of the LT100 course at over 9,700 feet. Enjoy a fast out and back on paved and dirt roads with aid at the turnaround and awards..