Trail Running Calendar Colorado 2026-2027

Lucky Lyons is a St. Patrick's Day themed run in Lyons, Colorado, featuring 5K and 10K races on mixed terrain. The 10K serves as a Bolder Boulder qualifier. Participants receive finisher dog tags, with awards for top age group finishers.

Experience high altitude trail running in Salida with beautiful views of the Arkansas Valley. Choose between a marathon, half marathon, or two mile run on a mix of dirt roads and hilly single track trails.

Race the Ranch is a snowshoe event at Snow Mountain Ranch YMCA in Colorado. Participants must carry snowshoes on courses featuring groomed trails and mountain terrain. Registration includes a YMCA day pass and finisher socks.

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..

Run The Ranch offers trail races on the private, scenic grounds of Sylvan Dale Guest Ranch in Colorado. Choose from Friday evening 5k/10k races or Saturday's timed endurance runs and relay events. The event includes meal tickets, a mandator..

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 inaugural Earth Day 5K on the Animas River Trail in Durango. This fun run/walk supports Compañeros, an organization serving immigrants. It's a Zero Waste event encouraging participants to bring their own water.

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..

Run the fast trails of Greenland Open Space in Colorado this May. Choose from four distances, from a 4-mile race to a 50K championship event. All runners receive a tech shirt and medal, with pizza waiting at the finish.

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.

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..

Event Overview The Quad Rock 50 is a 50-mile trail race held in the hills west of Fort Collins, Colorado. The event takes place on a single-loop course through Lory State Park and Horsetooth Mountain Park. The course consists of two 25-mile..

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..