Trail Running calendar near Aspen 2025-2026

USCSA Cross Country Ski Racing Festival, hosted by Colorado Mesa University at Snow Mountain Ranch Nordic Center in Granby, Colorado, on January 24–25, 2026, brings collegiate teams together with junior skiers for a two-day Nordic festival...

Take on the 12 Hours of Sunlight, a timed 12 hour race at Sunlight Mountain Resort in Glenwood Springs. Ski or split board solo or with a team to complete as many 1.3 mile uphill laps as possible, each with roughly 1,800 feet of gain.

Gothic Mountain Tour is a scenic Nordic ski fundraiser in Crested Butte on Feb 15, 2026 supporting Crested Butte Nordic. Choose 23.5 miles competitive or 17.85 miles recreational and finish at the Magic Meadows Yurt.

Run Through Time in Salida Colorado offers marathon, half, 2 mile and kids 400 meter races on scenic high altitude Arkansas Hills trails. Limited fields, single track terrain and custom race socks make for a memorable spring trail day.

Race The Ranch at Snow Mountain Ranch near Granby Colorado on April 4 is a scenic snowshoe event with distances from 5k to 50k on singletrack and groomed trails. Finishers earn a custom beanie and engraved Miir camp mug.

Summits Trail Runs at Granby Ranch Resort on June 6, 2026 offers single track through alpine meadows and aspen groves. Choose distances from 6 mile to 50k or take on the multi loop Elevation Challenge.

Run high in the Rockies at the Life Time Leadville Trail Marathon and Heavy Half in Leadville, Colorado on June 27, 2026. Tackle mountain trails to Mosquito Pass above 13,000 feet and chase Leadville Trail 100 qualifying spots.

Race in the Clouds at Alma Cemetery Meadow is a high country weekend of mountain bike, trail and off road duathlon racing at 10,600 feet. Multiple distances, youth events and on site camping create a true alpine festival vibe.

Run high alpine trails above 10,000 feet at the Silverheels Trail Runs in Como, Colorado, with distances from 10 Mile to 100 Mile winding through meadows, historic mining sites, and ghost towns. Limited fields make this a true mountain adve..

Take on the Silver Rush 50 in Leadville, Colorado, a scenic trail and dirt road 50 mile mountain challenge with about 7,500 feet of climb and a high point near 12,024 feet. Top finishers can earn a Leadville Trail 100 qualifier coin.

Grin & Bear It is a rugged trail run and mountain bike event in Crested Butte featuring a challenging 25 km loop with big climbs and a long descent plus a 15 km run to Green Lake. Expect high alpine views, rocky singletrack and minimal aid.

High Lonesome 100 is a rugged 100 mile mountain loop in Colorado, crossing five alpine passes and sections of the Continental Divide and Colorado Trail. Mid July racing delivers big climbs, sweeping alpine views, and a true endurance test.

Three days of high alpine trail running around Leadville, Colorado crossing the continental divide from Hope Pass to Red Cliff with stunning fourteener views. Choose Full Pint or Half Pint stages, enjoy on site camp life with live bands, sh..

The Summit 200 is a rugged 200 mile loop around Summit County Colorado, climbing about 40,000 feet on high alpine trails. Capped at 100 and requiring a prior 100 mile finish, it rewards experienced runners with a scenic high altitude test.

Aspen Backcountry in Aspen, Colorado offers rugged trail races in 50K, marathon and heavy half distances with big elevation and stunning alpine views. Start and finish at Rio Grande Park and stick around for the Duck Derby festival.

Sheep Mountain Trail Runs in Fairplay Colorado offers 50 mile, 50k and half marathon courses across technical singletrack and alpine roads averaging over 10,600 ft. Expect sweeping mountain views, tough terrain and variable August weather.

Run the Rockies Trail in Frisco, Colorado is a scenic 5k, 10k and half marathon on single track and dirt roads with views of Dillon Reservoir and the Ten Mile Range and a lakeshore finish. The half gets new single track in 2026.

Run the legendary Leadville Trail 100, a 100 mile high country ultra through the Colorado Rockies with epic climbs to Hope Pass and rugged mountain scenery. Chase the iconic buckle and an unforgettable high altitude adventure.

High altitude trail running in Fraser, Colorado on August 22, 2026, with a scenic half marathon through dirt roads and trails and a 5K around the rodeo grounds. Proceeds support the Shining Stars Foundation for children with cancer.

Challenge yourself on the Cirque Series at Arapahoe Basin on September 5, 2026 in Keystone, Colorado. This scenic 9.4 mile mountain course with 2,211 ft of climbing delivers steep, technical trail and big alpine views in a capped field.