Trail Running calendar near Aspen 2026-2027

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.

A Memorial Day trail event in New Castle, Colorado, honoring a fallen hero with riverfront routes. Options include 3.5 km and 7.7 km courses with both in person and virtual entries.

A 20K clockwise loop around Turquoise Lake that mixes hilly paved road and single track trail, held May 30, 2026, with $40 adult registration and free entry for youth 17 and under. Proceeds support local youth athletics and recreation.

A scenic *5 km* cross country race at the Leadville National Fish Hatchery on May 31, 2026, with dirt road, path and trail sections. Awards are given by age group and youth registration is free.

Six trail races across Summit County, Colorado, in summer 2026. Series registration includes long and short course options with adult, youth, and non binary categories and events at multiple Summit County trail heads.

A mountain trail event in Snowmass Village on June 5-6, 2026 offering a 6.6 mile Red Loop and timed 6 hour and 24 hour ultras, with campground hub, on-site amenities, and 2026 as the final year at Snowmass.

A two-day team relay in Snowmass Village on June 5 to 6, 2026, featuring teams of four or eight covering 120 miles and 17,888 feet of gain, with camping, village amenities and alpine trail scenery.

Experience the Rocky Mountains at Granby Ranch Resort with distances ranging from 6 miles to a 14 hour elevation challenge. Runners navigate single track trails through aspen groves and alpine meadows with views of the mountain range.

A mountain trail *10K* on Vail Mountain at nearly 9,000 feet with varied terrain, two cupless aid stations and a mass-start format. The race includes multiple age categories from 12+ and a $12,200 prize purse.

A four-race running series in Winter Park, Colorado, from June 14 to August 22, 2026. Events range from a family 5K to half marathons and are scored by a points system with Open Men and Open Women categories.

A three day Leadville training camp that walks and runs major sections of the Leadville Trail 100 course, pairs guided day and night runs with recovery and nutrition support, and includes panels, Q&A sessions and a provided running kit.

A trail run at Creekside Park on June 20, 2026 offering 10K and 5.2K courses as part of the Vail Trail Running Series; the race benefits the Vail Valley Charitable Fund and features aid stations, finish-line food, awards, and on-site maps.

A summer and early fall series of four half marathons and a 25K across Colorado in 2026, with options to enter three, four, or all five events; races include Estes Park, Georgetown to Idaho Springs, Mt Sneffels, Ned Ned, and Lead King Loop.

At 10,600 feet in Alma, Colorado, Race in the Clouds is a June 25 to 28 Dirt Fest featuring mountain biking, trail running, off road duathlon, youth races and meadow camping, with USA Triathlon sanctioning and age group awards.

Trail marathon and Heavy Half on historic mining roads and single track, topping out at Mosquito Pass 13,185 feet. Distances are 26.4 miles and 15.46 miles with aid stations, chip timing, and limited crew access.

A three-race trail series at Sunlight Mountain Resort in Glenwood Springs from June to September 2026, featuring 5k, 10k and a half marathon. Each event has specific bib pickup, registration rules, and course support details.

A 5K run/walk in Winter Park, Colorado following the Fraser River Trail from Gondola Plaza to the Rendezvous Event Center, with an after party featuring refreshments, awards and prize giveaways.

A downtown Leadville Fourth of July 5K held above 10,000 feet, with adult fees rising from $25 to $30 after July 2 and free entry for youth 17 and under. Proceeds support local youth athletics and recreation.

A historic uphill trail race on Vail Mountain covering about 12.2K (7.6 miles) with 2,128 ft of gain, three aid stations, on-course hydration and a Mid-Vail finish with awards by age group.

A high altitude trail running event in Como and Grant, Colorado offering ultras and shorter trail distances across alpine meadows, single track and historic mining terrain, with aid stations, drop bag options, crew and pacer rules.