Trail Running calendar near Denver 2026-2027

Celebrate St. Patrick's Day with a snowshoe or winter run at the Vail Nordic Center. Choose between 4K and 8K groomed trail courses followed by a festive afterparty and raffle.

Experience a snowshoe running event at the Snow Mountain Ranch YMCA in Colorado. Choose from 5k, 25k, or 50k distances on groomed trails and singletrack with a mandatory snowshoe requirement.

Experience private trails and diverse terrain at the Sylvan Dale Guest Ranch in Loveland. Choose from traditional 5k and 10k races or test your endurance in timed events ranging from 4 to 12 hours.

Celebrating its 11th year, the Mountain Ridge Trail Race winds through the rolling hills of Highlands Ranch, Colorado. Runners can choose from four distances, all on scenic dirt trails with rewarding front range views. The event is cupless,..

Explore Northern Colorado on the Poudre River Trail. This ultra offers 50 and 100-mile options, both for solo runners and relay teams. The unique 100-mile format combines a race day event with a virtual segment.

The Rattler Trail Race winds through the scenic singletrack of Palmer Park in Colorado Springs. Runners will enjoy panoramic city views and rock formations on a course with technical trails. Distances range from a 5K to a 50K.

The Great Western Trail Race, a BOLDERBoulder qualifier in Severance, Colorado, is not scheduled for 2026 but may return. It has featured 5k, 10k, half marathon, and kids run distances. The event supports local community foundations and non..

Experience a variety of trail distances from 4 miles to a 50K ultramarathon in Douglas County. Run on soft dirt trails with clear views of Pikes Peak and enjoy chip timing and post race refreshments.

Niwot's Challenge is a secretive, map-and-compass adventure in Colorado for experienced navigators. It features unsupported loops with significant off-trail travel and elevation gain. Entry is by application only for a limited field of part..

Run through the stunning red rock scenery of Garden of the Gods on traffic-free roads. Choose from a 5K, 5-mile road or trail race, or a 9.5-mile Double Take challenge. All participants receive a custom shirt and finisher's medal.

Experience the 45th annual run along the scenic High Line Canal in Centennial. Enjoy chip timed 5K or 10K races followed by a pancake breakfast and beer garden.

The Valkyrie Trail Race is a women's trail running event in Cheyenne Mountain State Park. Choose from six distances, from 4 miles to 50K, on courses with meadows, singletrack, and technical paths. Registration includes park entry, a shirt,..

Experience the rugged beauty of the Rocky Mountain foothills in Fort Collins with a 25 or 50 mile trail race through Lory State Park and Horsetooth Mountain Park featuring significant vertical gain and scenic ridgeline views.

Ram Party Trail Runs offers a scenic weekend on the trails around Rampart Reservoir near Woodland Park, Colorado. Choose from five distances, including a point-to-point 60K and a vert-heavy 50K. The event features stunning views of Pikes Pe..

Samson's Revenge is a trail race on the historic grounds of the YMCA of the Rockies in Estes Park. Runners can choose from 10k, 27k, or 55k distances on a challenging loop course. All participants receive a day pass to the YMCA and custom r..

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.

Experience a mountain trail ultramarathon through the scenic Buffalo Creek Recreation Area in Colorado. Choose between a 50 mile or 50K course featuring nearly 100 percent singletrack trails and stunning granite rock formations.

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.

Experience a scenic 5K trail run through subalpine forests and lakeside paths at the historic Leadville National Fish Hatchery. This cross country style event supports local youth athletics and recreation in the Leadville area.

Experience the Rocky Mountains at Granby Ranch Resort with distances ranging from 6 miles to a 14 hour elevation challenge. Runners navigate single track trails through aspen groves and alpine meadows with views of the mountain range.