Trail Running Calendar Colorado 2026-2027

The Pilgrimage is a multi route ultramarathon in the high desert near Mack, Colorado, where 45 runners have 150 hours to complete 55 mile Journeys. Choose crewed support or go uncrewed; navigate five rotating off pavement routes for a raw,..

Take on the Collegiate Peaks Trail Run in Buena Vista Colorado with 25 or 50 mile options through stunning high country. Mark the 36th anniversary with a memorable mountain trail challenge.

Valkyrie Trail Race in Cheyenne Mountain State Park near Colorado Springs offers women's trail races from 4 miles to 50K on limestone meadows, singletrack and rocky pine trails. The event is scheduled for Saturday May 9 2026.

A two-day outdoor festival in Fruita, CO featuring a trail half marathon, mountain bike and gravel 50K races, guided canyoneering, clinics, kids races, and reserved camping at the North Fruita Desert Trailhead.

Trail races on scenic, well marked singletrack around Fort Collins. Choose a 25 mile loop with about 5,500 feet of gain or run a second loop for 50 miles and roughly 11,000 feet of ascent, with staffed aid stations and enforced cut-offs.

A 13.8 mile singletrack loop in the North Fruita Desert with about 1,000 feet of climbing, three aid stations, and desert views of buttes and mesas. The race is part of the Adventure Fest weekend with camping, bike races, clinics, and award..

Ram Party Trail Runs in Colorado Springs offers five trail distances from 15K to 55 miles around Rampart Reservoir with point to point and out and back course options, aid stations, drop bags, limited parking and shuttle service for the 60K..

Experience a scenic 14 mile loop around Vallecito Reservoir at the Vallecito Lake Heavy Half Marathon in Bayfield, Colorado on May 16, 2026. Limited to 250 runners, this fundraiser features varied terrain, pro timing, and a cupless, low imp..

Point to point trail races in Carbondale Colorado on May 17 2026 using the Up & Over single track between Flying Dog Ranch and Rock Bottom Ranch. Distances include a 10 mile and a 25k course with shuttles and a film festival weekend.

Trail trail race at the YMCA of the Rockies in Estes Park offering 10k, 27k and 55k looped routes. The course is mostly single track with a steep ascent at Bible Point and includes a day pass, a custom hat and wool finisher socks.

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 Grand River Park, New Castle, offering a family friendly 3.5 km riverside route and a longer 7.7 km route over scenic hilltops, with matching virtual distance options.

Two trail ultras in Buffalo Creek Colorado on May 30, 2026 covering singletrack through pine forest and burn areas. The event offers 50 Mile and 50K options, staffed aid stations, course markings, and a post race festival with awards.

A 20K route around Turquoise Lake in Leadville, CO, running clockwise from Matchless Boat Ramp with paved and single track sections. Adult entry is $40 and under 18 run free. Parking is limited and a day use fee may apply.

Hit alpine single track at Granby Ranch in Granby, Colorado on June 6, 2026 with options from 6 Mile to 50k and a unique Elevation Challenge. Expect rugged scenery, well stocked aid stations, and a lively resort finish.

A weekend trail running festival in Mueller State Park offering 100 mile, 100k, 50k and 25k looped races on smooth single and double track. The event includes night running options, crew access at aid stations, shuttled parking for shorter..

Aiden's Adventure 5K on June 6 in Colorado Springs is a family friendly run and kids dash honoring Aiden while benefiting local charities. Enjoy scenic trails, free shirts for early registrants, carnival games and food trucks.

The Mace’s Hideout 100 will take place in Beulah from Saturday 6 June 2026 to Sunday 7 June 2026. You can run between 50 and 100 miles.

A 10k-plus trail run at Devils Backbone Open Space in Loveland, CO, on a looped, flour-marked course with one aid station passed twice. Parking requires a park pass, finishers get a placing token, and awards follow at Loveland Aleworks.

A trail race at Barr Lake State Park in Brighton, CO offering 50K, 30K, half, 15K and 5K on flat, 100% dirt courses with loop and out-and-back formats. The event uses a cupless policy and includes state park parking fees.