Trail Running Calendar Colorado 2026-2027

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.

A trail race in Parker CO on May 31, 2026 featuring a Dipsea-style staggered start for the 10k, a steep stepped incline, rolling singletrack, and a kids 1 mile route to the top and back down.

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 three-race summer trail series in Durango pairing professionally timed 5K to 10K trail races with local breweries and nonprofit partners. Each event includes post-race celebrations, awards, and a free beer for 21+ attendees.

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.

Trail races at Granby Ranch Resort in Colorado offer multiple distances including a 14 hour Elevation Challenge based on completed loops. The combined field is capped at 250 and the event includes aid stations, drop bag options, and on-site..

A looped trail ultrafestival in Mueller State Park on June 6 to 7 2026 offering 100 mile, 100k, 50k and 25k races on smooth single and double track. Aid stations are crew accessible and a night run takes place at sunset.

A community memorial event in Colorado Springs offering an in-person 5K, a virtual 5K with mailed shirts and medals, and a 1 mile kids dash. All proceeds are donated to local charities in Aiden's name.

A trail event near Beulah, Colorado offering 50-mile and ~101-mile options across the Wet Mountains, with large elevation range and distinct east- and west-side ecosystems.

A festival at Luvin Arms Animal Sanctuary in Erie Colorado featuring multiple distance and timed events on a mostly flat off road loop with Rocky Mountain views and sanctuary animals nearby.

A 10k+ trail race on the Devil's Backbone trails in Loveland, Colorado, the 2026 edition is announced as the final running; the looped course uses Hidden Valley, Hunter Loop, Laughing Horse, and Wild Loop with an aid station near 3 miles.

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 looped trail race at Barr Lake State Park near Brighton, Colorado, offering 5K through 50K distances on dirt trails with continuous lake and Front Range views. Courses feature low elevation gain per loop and varying aid station coverage.

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.

Races on June 14, 2026, through the sandstone formations of Garden of the Gods Park in Colorado Springs. Options include a 10 Mile, two 10K races (road and trail) and a 2.9 mile Youth Classic; registration windows and fees vary.

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 (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.

San Juan Solstice 50 Mile Run on June 20, 2026 uses MAProgress live tracking; entry was by lottery with 300 registered and 285 on the waitlist. All runners must carry a registered tracker which can be owned, borrowed, or rented.