Trail Running calendar near Glenwood Springs 2026-2027

A five-race Colorado series consisting of four half marathons and a 25K across mountain towns and trails, held June–September 2026, with series scoring and events organized by HAL Sports and local nonprofit race organizers.

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 through Leadville’s historic mining district on June 27, 2026, reaching Mosquito Pass at 13,185 feet. The Marathon is a Leadville Trail 100 qualifier and general registration is sold out.

A trail run at Howelsen Hill with 5K and 10K singletrack courses featuring significant early climbs, an aid station on the 10K, and a post-race awards celebration at Little Toots Park.

A three-race trail series near Glenwood Springs, Colorado, running June 27 to September 19, 2026, with 5k, 10k and half marathon options, bib pick up at Sunlight Mountain Resort and one aid station on the half marathon course.

A community 5K in downtown Leadville on July 4, 2026, with a youth category and an Independence Day parade afterward. Proceeds support local youth athletics and recreation.

A 12.2K uphill trail race in Vail, Colorado marking its 50th running, the Vail HillClimb gains 2,128 feet across dirt and gravel service roads to finish at Mid-Vail, with aid stations, race shirts, awards by age group and a post-race raffle..

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.

A trail event at the Crested Butte Nordic Center featuring a 15 km out and back run, a 25 km loop run, and a technical 25 km mountain bike race with alpine climbs and a Green Lake checkpoint.

A high-altitude out-and-back ultra in Leadville with about 8,000 feet of gain over 50 miles, multiple aid stations, and an LT100 Run qualifier; additional 15-mile and juniors 5K distances are offered.

The STRS Horseshoe Gulch Grind will take place in Breckenridge on Wednesday 15 July 2026.

A mountain trail event at Powderhorn Mountain Resort on July 18, 2026, with a *5K* climb gaining over 1,500 ft and a *15K* that repeats the ascent. Registration includes resort entry, a t-shirt, finisher item, post-race food, and a lift pas..

A trail race on Spring Creek near the gazebo in Steamboat Springs offering a 9.5 mile loop with steep early climbs and a 5K out and back. The long course has one aid station and is cupless.

Experience the mountain trails of Aspen Snowmass with three distinct race distances. Runners can choose between a 50K trek across four mountains a 25K trail run or a 10K course starting from the Elk Camp Gondola.

High-altitude trail races on Vail Mountain offering 10K and 5K courses that start near Gondola One, feature singletrack and gravel sections, on-course aid stations, post-race refreshments, and age-group awards.

Grand Mesa Ultras on July 25, 2026 in Grand Mesa, Colorado features high-elevation trail races in three distances with single track mountain terrain, camping options, and post-race awards and amenities.

Experience a historic Colorado tradition where runners and burros compete together. Navigate mountain trails and high altitude passes while carrying traditional mining gear in this unique world championship event.

A single 200-mile loop around Summit County, Colorado on trails, 4WD roads and rec paths, with elevations above 9,000 ft and sections over 12,700 ft. The field is capped at 75 runners and includes 12 aid stations, four sleep stations, and l..

STRS #4 - Tom's Baby on July 29, 2026 takes place at Tom's Baby Trailhead in Breckenridge, CO, offering short and long course entries with adult, youth, and non-binary categories and published entry fees.

Experience high elevation trail running in the mountains of Fairplay Colorado. This event offers three distances ranging from a half marathon on forest roads to technical ultramarathons through remote wilderness terrain.