Trail Running Calendar Colorado 2026-2027

Experience a unique 7.4 mile community trail race through the canyon trails of O’Fallon and private Kittredge lands. Enjoy a post race celebration at Kittredge Park with food, a sauna, and a fun kids lap run.

Experience a scenic 13.8 mile singletrack loop through the stunning North Fruita Desert. Enjoy flowy trails and desert mesa views as part of a vibrant outdoor adventure festival weekend in Colorado.

Experience the natural beauty of Mueller State Park with various trail distances from a 10k to 12 hour timed ultra events. Choose between traditional distance loops or a unique randomized format determined by colorful draws.

Multi-distance trail races around Rampart Reservoir near Woodland Park and Colorado Springs. Distances range from 15K to 55 miles, including a 60K point to point with mountain and reservoir views and a vert heavy 50K out and back.

Run the Sky Pilots Ouray Backyard Ultra in Fellin Park, completing a 4.167 mile loop each hour until one runner outlasts the field. Enjoy riverside trails, mountain views near 7,700 feet and shared aid.

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..

Kick off the trail running season in Eagle, Colorado, with a 14K or 6K race through scenic pinyon groves and single track trails ending with a festive afterparty.

Challengers tackle a 6 mile climb gaining 2000 feet of elevation to reach the South Rim of the Black Canyon. Choose between a timed run or a scenic walk ending with a mountain breakfast and park views.

Experience the beauty of the Roaring Fork Valley with a point-to-point trail race from Carbondale to Basalt. Choose between 10-mile and 28k distances featuring iconic single track trails and a festive finish at Rock Bottom Ranch.

Trail races at the YMCA of the Rockies in Estes Park with 50k, 25k and 10k options on a looped course featuring the Bible Point climb, two aid stations, and race swag including a Fractel hat and wool socks.

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.

Test your endurance at this Golden Colorado event following the classic backyard format with 4.17 mile laps every hour. Support the Sun Valley Kitchen and Community Center while pushing for your personal best distance.

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.

The Pyro's Push It Up River Trail Run will take place in New Castle on Monday 25 May 2026. You can run 8 kilometers.

Test your endurance at high altitude with a range of obstacle course races from 5K to 50K held at the scenic Fort Carson Army Base near Pikes Peak.

Test your resilience on a scenic two mile dirt loop in Northern Colorado with distances ranging from 7k to 100 miles. Enjoy a festival atmosphere featuring glamping, saunas, cold plunges, and relay options for teams.

An ultramarathon near Denver offering 50 mile and 50K courses on soft singletrack through burned areas, ponderosa pine and granite rock formations. Part of the entry proceeds supports the North Fork Volunteer Fire Department.

A last-person-standing ultra on Durango's Spurline trails. Run a 4.17-mile loop every hour until only one runner remains. All proceeds support local trail building and maintenance.

A 20K loop around Turquoise Lake in Leadville, CO, running clockwise with hilly paved road then single-track trail. Proceeds support Leadville youth athletics; adult entry is $40 and youth 17 and under enter free.

A 5K trail run at the Leadville National Fish Hatchery on May 31, 2026, with a cross country style route through subalpine forest around Evergreen Lakes and lower Rock Creek. Proceeds support Leadville youth athletics and recreation.