Trail Running Calendar Colorado 2026-2027

Experience the scenic trails and mountain views of Salida at this annual trail event. Choose between a marathon, half marathon, or two mile run on a mixture of single track and dirt roads through the Arkansas Valley.

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.

A three-day trail running festival in the high desert of Fruita, Colorado. Runners can choose from four distances on scenic singletrack with views of the Colorado River. The event offers a festival atmosphere with family activities and serv..

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.

Join the Durango Running Club for a 5K fun run and walk along the Animas River Trail. This zero waste event supports immigrant services and kicks off the local Earth Day festival and parade.

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..

The Royal Gorge Groove offers trail races along the rim of the scenic Royal Gorge in Colorado. Choose from distances from a 50K ultra to a 5K, all finishing at the Royal Gorge Ranch & Resort. Experience rugged, historic trails with full eve..

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.

Celebrate the 36th anniversary of this Colorado trail run. Choose between a 25-mile or 50-mile course starting near Buena Vista. The route offers high-altitude running on historic trails with significant elevation change.

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 Pilgrimage is a unique 150-hour ultramarathon in Colorado's high desert. Runners tackle five changing loop sequences, emphasizing solitude and self navigation. The event features separate crewed and uncrewed divisions.

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,..

Adventure Fest is a weekend festival of outdoor sports in Fruita, Colorado. It features a trail half marathon, mountain bike races, and a gravel challenge, plus camping, clinics, and family activities. The event culminates with a two-day en..

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.