Trail Running Calendar Colorado 2026-2027

A roughly 14 mile loop around Vallecito Reservoir in Bayfield, Colorado, combining paved road, dirt road and singletrack with about 1,000 ft of climbing. The event features four aid stations, a cupless policy and a post-race meal with live..

Point to point trail races in Carbondale, Colorado offering a 10 mile and a 25k on the Up & Over single track. The weekend includes a film festival, shuttle service from Carbondale, and a post race gathering at Rock Bottom Ranch.

Samson's Revenge is a trail race on the grounds of the YMCA of the Rockies in Estes Park, Colorado. Runners can choose from a 10k, 27k, or 55k distance on a challenging looped course with significant elevation gain. Registration includes a..

The Farish Trail Race takes place on May 23, 2026 at the Farish Recreation Area in Woodland Park, Colorado. Participants can run a half marathon, 10K, 5K, or a free kids' one-mile event. The first 200 finishers get a special hat.

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.

The Summits Trail Runs offer a variety of distances on mountain trails at Granby Ranch Resort in Colorado. Courses feature single-track paths through forests, meadows, and aspen groves. This event focuses on community and the natural beauty..

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 is a community run/walk honoring a young child's memory. The event features a flat dirt trail 5k, a kids' dash, and family-friendly activities like carnival games and a butterfly release. All proceeds support local char..

This ultra takes runners through the contrasting ecosystems of Colorado's Wet Mountains, from mossy forests to arid slopes. The 100-mile route features significant elevation changes and stunning mountain views. Registration is limited to 75..

Run the trails at Devil's Backbone Open Space in this classic 10k+ loop course. The event features old-school stick timing and finishes with an awards ceremony at a local brewery. This race series will conclude after the 2028 edition.

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.

A trail race at Howelsen Hill in Steamboat Springs on June 13, 2026 featuring 8 mile and 4 mile single track loops on Emerald Mountain. Proceeds benefit the Knights of Columbus and awards and a prize raffle follow the race.

On June 14, 2026 in Colorado Springs, the Garden of the Gods event offers a 10 Mile, 10K and a trail run through 300-foot sandstone formations around Balanced Rock. Registration opens March 1, 2026.

Event Overview The Leadville Trail 100 Run Camp is a three-day event scheduled for June 19-21, 2026. It is designed as an introduction and training tool for the Leadville Trail 100 Run. The camp is open to all runners, with group training r..

Tackle a rugged 50-mile journey through the high mountains near Lake City, Colorado. This classic ultra, a benefit for local EMTs, features technical trails and multiple creek crossings. Runners need proven mountain experience to take on th..

Trail running at Garden of The Gods in Colorado Springs with 100K, 50K and 35K courses. Routes use Midland Trail, North Cheyenne Cañon, and Pike National Forest, with significant elevation gain and staffed aid stations.

Explore Colorado's peaks in this series of five mountain races. Run four scenic half marathons and a challenging 25K across the state from June to September. Participants can choose to tackle three, four, or all five events.