Trail Running Calendar Colorado 2025-2026

The 12 Hours of Sunlight is an exciting running event taking place in Glenwood Springs, Colorado. Participants can choose to compete individually or as part of a team, with options for teams of two or four. This endurance race challenges runners to cover as much distance as possible within a 12-hour..

The Big Brrrrito event offers participants the choice of running 5 miles, 10 miles, or 15 miles through the scenic trails of Chatfield State Park in Colorado. Organized by the Roxborough Running Club, this running event is set to take place on January 25, 2025. Registration for the event will close ..

The Rio Frio 5k on Ice is a unique running event taking place in Alamosa, Colorado, on January 25, 2025. This race is notable for being conducted entirely on the frozen Rio Grande, offering participants a rare opportunity to run on ice while enjoying stunning views of the surrounding mountains. The ..

The Running Up for Air - Staunton Rocks is an endurance running event taking place at Staunton State Park in Pine, Colorado, on February 14-15, 2025. Participants can choose from various challenges, including 3, 6, 12, and 24-hour races, running a marked 7.1-mile loop with significant elevation gain..

The Stories Trail Runs, part of the Human Potential Running Series, is an exciting winter trail running event set in Colorado Springs, CO, at Cheyenne Mountain State Park. Scheduled for February 15-16, 2025, the event features a variety of races, including a 10k, Half Marathon, and timed ultra event..

The Gothic Mountain Tour is a scenic running event taking place in Crested Butte, Colorado, featuring two courses: a 23.5-mile competitive race and a 17.85-mile recreational race. This challenging event offers participants the opportunity to experience the stunning beauty of Gothic Mountain while te..

The Pine Needle Langlauf Nordic Ski Race is a premier freestyle skiing event held in Durango, Colorado. This challenging race features multiple distances, including a 30K Langlauf, 20K Halftelauf, 10K Mittellauf, 4K Kurzlauf, and a 2K Weniglauf, catering to participants of all skill levels. The even..

The Winter's End Snowshoe Races, hosted by the Human Potential Running Series, is an exciting winter running event taking place at Granby Ranch Resort in Granby, Colorado. Scheduled for March 8, 2025, the event features multiple race distances, including a 2-mile "Fun Run," an 8-mile, a 16-mile, and..

Lucky Lyons is a festive running event held in Lyons, Colorado, featuring 5K and 10K races to kick off St. Patrick's Day celebrations. Participants are encouraged to wear their best green attire as they navigate scenic courses that include paved, gravel, and dirt paths.The event supports the Lyons C..

The 20th Annual Run Through Time Trail Marathon and Half Marathon will take place in Salida, Colorado, featuring a marathon, half marathon, and a 2-mile run. The event showcases scenic and challenging courses on dirt roads and narrow single tracks, with elevations ranging from 7,000 to 9,000 feet. P..

Run The Ranch is an exciting trail running event held at Sylvan Dale Guest Ranch in Loveland, Colorado. Scheduled for April 4-5, 2025, participants can choose from various distances, including a 5K, 10K, and multiple timed trail runs ranging from 4 to 12 hours, both solo and in relay formats. The ev..

The Desert RATS Trail Running Festival by UTMB offers an exciting weekend of trail running in the stunning landscapes of Fruita, Colorado. With four unique race distances—100K, 50K, 21K, and 10K—participants can enjoy three days of racing amidst breathtaking desert views. This festival caters to bot..

The Rock Hawk Trail Races, part of the Bear Chase Race Series, take place on April 19, 2025, at Phillip S. Miller Park in Castle Rock, Colorado. This event features multiple race distances, including 50K, 25K, 10K, and 5K, catering to both novice and experienced trail runners.The scenic trails offer..

The Great Western Trail Race, taking place in Severance, Colorado, celebrates the region's newest trail connecting Windsor, Severance, and Eaton. Participants can choose from various events, including a 5k, 10k, half marathon, and a Kids Fun Run. The race features a mostly flat and fast course with ..

The Rattler Trail Race, taking place in Colorado Springs, features three race distances: 50K, 25K, and 10K. Set in the scenic Palmer Park, participants will experience breathtaking views of the city and Pikes Peak while navigating technical trails with unique rock formations. The course is designed ..

The Cheyenne Mountain Trail Race, taking place in Colorado Springs, CO, features multiple race distances including 50K, 25K, 7 Miler, and 4 Miler. Set against the stunning backdrop of Cheyenne Mountain State Park, participants will navigate scenic trails that include grassy meadows and wooded areas...

The Royal Gorge Groove is an exciting trail running event taking place at the Royal Gorge Ranch & Resort in Cañon City, Colorado. Scheduled for April 26, 2025, participants can choose from various distances, including 50K, 30K, 20K, 12.5K, and 5K, all set against the stunning backdrop of the Royal G..

The Falcon 50 is an annual race series held on May 3, 2025, at the USAF Academy in Colorado Springs, CO. Participants can choose from five race options: 50 Miler, Marathon, Military Heavy, Half Marathon, and Military Half-Heavy. The scenic course features challenging terrain primarily on dirt trails..

Take 5 in the Garden is a unique running event held in the scenic Garden of the Gods in Colorado Springs, CO. Participants can choose between various race options, including a road race, a trail race, and a 9.5-mile course, all set against the stunning backdrop of iconic rock formations and Pikes Pe..

The Collegiate Peaks Trail Run, celebrating its 35th anniversary, is a renowned trail running event held in Buena Vista, Colorado. Participants can choose between two challenging distances: 25 miles and 50 miles. Established in 1991, the race features a scenic course that follows single-track and je..