Trail Running calendar near Glenwood Springs 2025-2026

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.

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 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.

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..

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.

Test your trail legs at the Spring Creek Memorial Trail Run in Steamboat Springs on July 18 2026. Choose a challenging 9.5 mile loop with steep climbs and stream crossings or a rolling 5K, with proceeds supporting local nonprofits.

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.

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 Aspen Backcountry on August 1 in Rio Grande Park with three distances from a 50K to a hearty half marathon over rugged alpine trails and big elevation gain. Celebrate at the finish festival with live music, food trucks and famil..

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.

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..

Tackle the legendary Leadville Trail 100, a 100 mile out and back ultramarathon through the high Colorado Rockies with steep climbs, technical singletrack and alpine passes up to 12,500 feet. Expect epic views, serious altitude and belt buc..

Run steep, scenic high country around Steamboat Springs with 5 mile, 16 mile, and 50K options that climb above 10,000 feet. Starts and finishes on the Torian Plum Lawn, with remote aid stations and proceeds supporting trail maintenance.

Run 40 miles across the Elk Mountains from Crested Butte to Aspen along the Grand Traverse route with more than 6,000 feet of climbing. A fundraising point to point ultramarathon with aid stations and a post race shuttle.