Trail Running calendar near Aspen 2025-2026

Join the USCSA Cross Country Ski Racing Festival at Snow Mountain Ranch in Granby Colorado on Jan 24 and 25 2026. Collegiate teams and middle and high school racers take on classic distances and a skate sprint over two action packed days.

Ski around Gothic Mountain at the Gothic Mountain Tour in Crested Butte on Feb 15, 2026. Choose a 23.5 mile competitive or 17.85 mile recreational course and support Crested Butte Nordic in this intimate 200 person fundraiser.

Run the scenic Run Through Time trail marathon and half in Salida Colorado, over rugged single track and jeep roads with Arkansas Valley views at 7000 to 9000 feet. Entrants get custom socks and proceeds support local trails and SAR.

Race The Ranch is a scenic snowshoe race at Snow Mountain Ranch in Granby Colorado on April 4 2026, with 50k, 25k and 5k loop options over snowy singletrack and groomed trails. Finishers receive a custom bib, Fractel beanie and engraved Mii..

Take on the Collegiate Peaks Trail Run in Buena Vista Colorado with 25 or 50 mile options through stunning high country. Mark the 36th anniversary with a memorable mountain trail challenge.

Tackle scenic single track on the slopes of Mt Sopris near Carbondale, Colorado with point to point 10 mile and 25k races finishing at Rock Bottom Ranch in Basalt. Expect steep climbs, flowing descents and lively trail festival energy.

Celebrate Memorial Day weekend with the Spirit Trail Race in Buena Vista, Colorado, a scenic trail event with marathon, half marathon and 9k options. Start in town square, enjoy Paddlefest fun, and support local nonprofits.

Celebrate Memorial Day with Pyro's Push It Up River Trail Run on May 25 in New Castle, honoring a fallen hero. Choose a family friendly 3.5 km riverside run or the scenic 7.7 km with hilltop climbs, available on site or virtually.

Run the Summits Trail Runs on June 6, 2026 at Granby Ranch Resort, Colorado, with options from a 6 mile to a challenging 50k. Experience single track trails, alpine meadows, and big climbs in a limited field for an intimate mountain race.

Join the Leadville Trail 100 Run Camp in Leadville, Colorado, June 19 to 21 for a three day preview of the LT100 course. Enjoy guided day and night runs, gear demos, shuttles and recovery services for a full race ready experience.

Race in the Clouds Alma Dirt Festival runs June 25 to 28, 2026 in Alma, Colorado at 10,600 ft. Mountain biking, trail runs, an off road duathlon, youth races and meadow camping offer high country climbs and single track thrills.

Run the Life Time Leadville Trail Marathon or Heavy Half on June 27, 2026, tackling high alpine singletrack and dirt roads through historic mining country up to Mosquito Pass at 13,185 feet. Expect a challenging, possibly snowy race with fu..

High Trails Retreat in Buena Vista July 9 to 12 2026 offers daily runs of 10 to 20 miles and an optional Hope Pass or Sawatch 14er climb. Stay riverside, share meals, relax by the river and pick routes with the group.

Tackle high alpine trails above 10,000 ft at the Silverheels Trail Runs in Como, Colorado, July 10 to 11, 2026. Choose distances from the 100 Mile ultra to shorter options and run single track, fire roads and scenic historic mining country.

Grin & Bear It is an annual Crested Butte trail event featuring a challenging 25 km loop, a 15 km out and back, and a mountain bike route through high alpine terrain and big climbs. Registration opens December 1, 2025.

Join the Life Time Silver Rush 50 Run in Leadville for a high alpine 50 mile out and back plus 15 mile and 5K juniors. With seven aid stations and Leadville Trail 100 Run qualifier spots, this is a true mountain challenge.

High Lonesome 100 is a 100 mile mountain ultramarathon in Chaffee County Colorado that loops across alpine passes, the Continental Divide and the Colorado Trail for epic high elevation views. Held July 17 to 18 2026 with a 37 hour cutoff.

Run a three day stage race across the Continental Divide from Hope Pass to Red Cliff in the Colorado Rockies. Fully supported camps with live bands, mobile showers and on site massage, plus a capped field of 500, make this a high alpine adv..

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.