Trail Running calendar near Grand Mesa 2026-2027

A scenic half marathon from Fanny Hill in Snowmass along the Government Trail through Aspen groves to Koch Lumber Park in downtown Aspen, presented by ACG and hosted by the Ute Mountaineer and the City of Aspen each late September.

Trail races of 50K, 28K and 15K take place in Hartman Rocks near Gunnison Colorado on October 3 2026. The course mixes slickrock, singletrack and doubletrack with wide mountain and basin views.

A point-to-point trail marathon and 30K in Colorado’s North Fork Valley at peak fall color, with mountain climbs to Inter-Ocean Pass and proceeds funding summer camp scholarships.

Grand Valley Backyard Ultra is a last-person-standing trail event near Fruita, Colorado where runners complete repeated 4.167 mile loops with one hour to finish each loop until only one runner completes an extra lap.

The Camp 4 Coffee Cart to Cart Trail Race will take place in Crested Butte on Saturday 3 October 2026. You can run between 10 and 19 miles.

A Halloween themed community event in Aspen on October 4, 2026, with a timed 5.6K run and a 1 mile walk around Koch Park and Marolt open space. Leashed dogs are welcome and net proceeds benefit the Friends of the Aspen Animal Shelter.

A 2 miles event at Moon Farm in Fruita, Colorado where participants carry a pumpkin through forests, fields and over hay bales. Each entry includes a pumpkin that is weighed and marked before the course.

Trail ultramarathon in Fruita, Colorado with multiple distance options from 10 miles to 50 miles, singletrack terrain, high desert views, and cupless aid stations with refill points.

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.

A 150-hour timed endurance race in Mack, Colorado featuring five off pavement routes that form a roughly 55-mile journey. Crewed and uncrewed divisions are offered and pacers are not allowed.