Trail Running calendar near Glenwood Springs 2026-2027

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 team trail relay in Snowmass Village on June 5-6, 2026 covering 120 miles total, about 15 miles per runner, with substantial elevation gain, village camping and recreation center amenities. The event is closed.

An evening 5K on Vail Mountain starting and finishing at Nature Valley Mountain Plaza, run as a single mass wave over varied mountain terrain with cupless aid and multiple age categories including nonbinary.

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.

Experience the single track trails of historic Howelsen Hill in Steamboat Springs. Choose between the 4 mile or 8 mile distance as you run through scenic aspen groves and vibrant wildflowers to benefit the Knights of Columbus.

A three-day Leadville training camp (June 19-21, 2026) with guided day and night runs, course sections, expert discussions, on-course nutrition, and event swag; minimum age 17 and general registration is sold out.

Trail races at Creekside Park in Beaver Creek on June 20, 2026 feature 10K and 5K courses plus a kids fun run. New course routes will be marked and aid stations provide water and Skratch hydration.

Four Colorado mountain events include four half marathons and a 25K across June to September 2026, totaling 67.9 miles. The series is coordinated by HAL Sports with nonprofit organizers supporting local youth programs.

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.

A high altitude trail marathon and 15.46 mile Heavy Half through Leadville’s historic mining district, topping out at 13,185 feet on Mosquito Pass. General registration is sold out and a waitlist is available.

SBT TRL in Steamboat Springs offers trail races at Howelsen Hill as part of the SBT GRVL weekend. Participants can choose a 5 km or 10 km distance with registration open from February 10 to June 27, 2026.

A three-race trail series at Sunlight Mountain Resort near Glenwood Springs featuring a 5K, 10K and half marathon, with specified bib pick up, aid station info, entry fees, age categories and podium prizes.

A Fourth of July 5K in downtown Leadville, CO, held above 10,000 feet. Proceeds support local youth athletics and youth entries are free.

A historic uphill trail race in Vail, Colorado celebrating its 50th edition on July 5, 2026. The 12.2K (7.6 mile) route gains 2,128 feet and finishes at Mid-Vail with aid stations, awards, a raffle and post-race refreshments.

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 historic Crested Butte trail event offering 15 km and 25 km runs plus a technical 25 km mountain bike course. Routes include long climbs, rocky singletrack and a Green Lake checkpoint with limited aid.

A high altitude 50 mile out and back near Leadville with about 7,500 feet of climbing, aid stations, designated crew zones, shuttle parking, and LT100 qualifier coins available.

Experience the STRS Horseshoe Gulch Grind in Breckenridge with short and long course options. This trail event offers categories for adults and youth starting from the Blair Witch Trailhead.

Trail running event in Mesa, Colorado on July 18, 2026 offering 5 km and 15 km courses. Organized by the Grand Junction Sports Commission; volunteers can register and full refunds or deferrals apply if canceled for severe weather.