Trail Running calendar near Buffalo Creek 2025-2026

Louisville Trail Race returns to Louisville, Colorado at Louisville Community Park. It offers three distances: Half-Marathon (13.1 miles), 10K (6.2 miles), and 5K (3.1 miles). The mostly dirt courses traverse scenic Front Range trails with views of the Flat Irons and a couple defining climbs, run as..

Colorado Cold Rush Ultra, held in Colorado Springs, offers 50K, half marathon, and 10K options. The race is billed as the "coolest" winter running event and features a route starting at Bear Creek Regional Park, climbing High Drive, and threading through tunnels from the Colorado gold rush along Gol..

Thumbs Up Vertical Challenge takes place in Estes Park, Colorado, on December 6, 2025. The race uses the Thumb Open Space trail, a 2km out-and-back course with 540 feet of vertical gain per lap. The route is 100% single-track with switchbacks, steps and steep rocks, offering views of Longs Peak, Mou..

The Sawmill Trail Runs is an annual trail running event held at Staunton State Park in Pine, Colorado, approximately 40 miles southwest of Denver. The race offers three distance options: 8-Mile, 16-Mile, and 50k, with a combined runner capacity of 250. The course features scenic and challenging terr..

The USCSA Cross Country Ski Racing Festival, hosted by Colorado Mesa University, takes place at Snow Mountain Ranch Nordic Center in Granby, Colorado. Scheduled for January 24-25, 2026, this event features collegiate and junior racers competing in classic and skate sprint races. Distances include 15..

Stories Trail Runs is a winter trail racing festival at Cheyenne Mountain State Park in Colorado Springs, CO, offering a scenic, community-focused atmosphere with views of Cheyenne Mountain, Pike’s Peak, and the Front Range. The weekend includes 6-Hour and 15-Hour timed events, plus traditional 10k,..

The 21st Annual Run Through Time Trail Marathon and Half Marathon takes place in Salida, Colorado. It offers a Trail Marathon, a Trail Half Marathon, and a 2 Mile Run, plus a free kids’ 400-meter dash in Riverside Park. Courses run on the Arkansas Hills Trail System—dirt/jeep roads and narrow, hilly..

Race The Ranch is a winter snowshoe race held in Granby, Colorado on the Snow Mountain Ranch YMCA property. It offers three distances: 5k (1 lap), 25k (2 laps), and 50k (4 laps), designed to accommodate runners of all levels. The course combines singletrack, doubletrack, and groomed snowshoe trails,..

Run the Ranch is an annual trail running event held at the scenic Sylvan Dale Guest Ranch in Loveland, Colorado. The race offers a variety of distances including 5K, 10K, and timed trail runs of 4, 6, and 12 hours, with options for solo runners and 4-person relay teams. Participants run on private r..

The Rattler Trail Race, held in Colorado Springs at Palmer Park, offers runners a chance to experience scenic singletrack trails with panoramic views of the city and Pikes Peak. The event features multiple distances: 50K, 25K, 10K, and 5K, catering to various skill levels. The course is known for it..

Royal Gorge Groove takes place in Cañon City, Colorado, offering 50K, 30K, 20K, 12.5K, 5K, and a Kids Run. All races start and finish at the Gunslingers Club at Royal Gorge Ranch & Resort, with the course running along the rim of the Royal Gorge, about 900 feet above the Arkansas River. The route fe..

Niwot’s Challenge, the 13th annual event, takes place in Sedalia, Colorado along the South Platte River. It isn’t a race but a reckoning, a Barkley-inspired grassroots ultrarunning ordeal of secrecy and mischief. The course is unpublished and largely off-trail—a riddle of rock, bushwhack, and bruise..

The Greenland Trail Races, held annually in May at Greenland Open Space in Larkspur, Colorado, offer four trail running distances: 4 miles, 8 miles, 25K, and the 50K ultramarathon, known as Colorado's fastest 50K. The course features wide, smooth dirt trails through native grasslands, ponds, oak hil..

Take 5 in the Garden is a scenic running event held in Colorado Springs, CO, within the stunning Garden of the Gods park. The race offers multiple distances including a 5K, 5 Miler, 5 Mile Trail, and a longer 9.5-mile Double Take course. The park is closed to traffic during the event, allowing runne..

The Valkyrie Trail Race, held in Cheyenne Mountain State Park near Colorado Springs, Colorado, is a women-focused trail running event offering distances from 4 miles up to 50 kilometers. The course begins on crushed limestone meadows before transitioning to singletrack trails ascending Cheyenne Moun..

Endure Trail Runs, the 6th annual Mueller State Park event in Divide, Colorado, centers at the Pisgah Point Group Campground. It features a unique 12-Hour Endure timed challenge, where runners draw colored balls to decide the next loop and accumulate miles within the allotted time. In addition, 10k,..

North Fork 50 Mile/50K is an ultramarathon set in the Colorado mountains just southwest of Denver, near Buffalo Creek. The event offers two distances: 50 miles and 50K. The course is 100% soft-surface, comprised mostly of singletrack trails with a few short sections of double-track road.Runners clim..

Crazy Legs 10k+ Trail Run takes place at Devils Backbone Open Space in Loveland, Colorado. The six-mile loop uses mostly single-track and includes a few doubled sections to limit backtracking. Runners traverse Hidden Valley, Hunter Loop, Laughing Horse Loop, and Wild Loop before finishing in the Dev..

The Summits Trail Runs, held at Granby Ranch Resort in Colorado's Rocky Mountains, offer a challenging and scenic trail running experience with distances from 6 miles to ultra distances including a 50k and a 12-hour Elevation Challenge. The courses feature rugged alpine terrain, single-track trails,..

Silverheels Trail Runs, the 12th annual event from the Human Potential Running Series, unfolds in Colorado, with races including 100k, 100-Mile, 50-Mile, 60k, 19-Mile, and 10-Mile. The revamped format places the main event at the Como Roundhouse in Como, CO, while the 100-Mile and 100k start at Burn..