Trail Running calendar near Lyons 2024-2025

Chase the Moon is an exciting 12-hour endurance running event held in the Highlands Ranch Backcountry trail system. Participants can choose to run solo or form teams of three or five for a relay. The race takes place overnight, starting at sunset and continuing under the full moon, offering stunning..

The Silverheels Trail Runs, part of the Human Potential Running Series, is an annual event taking place in Como, Colorado, featuring a variety of challenging distances including 10-Mile, 19-Mile, 60k, 50-Mile, 100k, and 100-Mile races. Set at an average elevation of over 10,000 feet, the course offe..

The Never Summer 100Km and 60Km races are set to take place from July 25-27, 2025, in the stunning landscapes of State Forest State Park, Colorado. Participants can choose between a challenging 100Km course with approximately 14,450 feet of elevation gain or a 60Km option with around 8,850 feet of e..

The Summit 200 is an extraordinary 200-mile mountain race set in Summit County, Colorado, featuring a challenging loop that showcases stunning hiking trails, forest roads, and scenic views. Participants will experience significant elevation changes, with the lowest point over 9,000 feet and sections..

The Sheep Mountain Ultras, part of the Human Potential Running Series, is an annual trail running event held in Fairplay, Colorado. Scheduled for August 2, 2025, it features three race distances: a challenging 50-mile, a 50k, and a half marathon, all set against the stunning backdrop of the South Pa..

The Boulder Rez Marathon is a scenic running event held at the Boulder Reservoir in Boulder, Colorado. Participants can choose from various distances, including a marathon, half marathon, 3/4 marathon, and 10K, all set along dirt roads and trails with stunning views of the reservoir and Rocky Mounta..

The Lory Summer Trail Series will take place in Bellvue from Tuesday 5 August 2025 to Monday 25 August 2025. You can run between 5 and 12 kilometers.

The Eltuck Valley 5K is a part of a fun summer trail race series held at Lory State Park in Bellvue, Colorado. This event is designed for both novice and experienced runners, offering a flat and fast course that serves as the first race in the series. Participants can enjoy a friendly atmosphere, wi..

The Med Bow Rail Marathon and Half Marathon, organized by the Friends of the Medicine Bow Rail Trail, will take place on August 9, 2025. This event features a marathon course that spans the scenic Medicine Bow Rail Trail, averaging an elevation of 8,926 feet, and briefly crosses into Colorado. The h..

The Holy COW Trail Stampede is an exciting running event held in Westminster, Colorado, featuring a 10-mile race and 5K/10K options. Participants can enjoy a fun and festive atmosphere while supporting the charity partner, Growing Home, which focuses on breaking the cycle of poverty for families in ..

The Into the Hills Eltuck 10K is part of a series of midweek trail races held at Lory State Park in Bellvue, Colorado. Scheduled for August 12, 2025, this race is known for its challenging terrain, featuring a significant elevation gain of 1,700 feet. The event aims to provide a welcoming atmosphere..

The Into the Hills Eltuck 5K is part of a series of midweek trail races held at Lory State Park in Bellvue, Colorado. Scheduled for August 19, 2025, this event features a challenging course with a steep climb and descent, making it suitable for both novice and experienced trail runners. Participants..

The Westminster Night Trail, celebrating its 12th year, invites runners to experience a unique nighttime race around Standley Lake in Westminster, CO. Participants can choose from various distances, including 50K, 35K, Half Marathon, 10K, and 5K, all set against the stunning backdrop of Colorado's n..

The Staunton Rocks! Marathon and Half Marathon, scheduled for August 23, 2025, is a premier trail running event held in Staunton State Park, Colorado. Designed by trail runners for trail runners, the race features scenic singletrack trails that showcase the park's natural beauty, including historic ..

The Front Range Ultra Dayze is an exciting ultra-running event taking place in Loveland, Colorado, from August 28 to September 1, 2025. This festival features a variety of ultra-distance races, including 200-mile, 100-mile, and timed events ranging from 12 to 100 hours. Participants can camp at the ..

The Cirque Series at Arapahoe Basin is a thrilling mountain running event scheduled for September 6, 2025. Participants will tackle a challenging 9.4-mile course with an elevation gain of 2,411 feet, starting from the base at 10,780 feet. The route features stunning views and diverse terrain, includ..

The HRCA Wildcat Mountain Trail Races, scheduled for September 6, 2025, in Littleton, Colorado, features a variety of events including a 10-mile race, a 10K, and a Kid's Race. The races take place on scenic dirt trails within the HRCA Backcountry Wilderness Area, offering participants stunning mount..

The Black Squirrel Half Marathon, scheduled for September 6, 2025, takes place in Lory State Park near Fort Collins, Colorado. This challenging 13.3-mile race features approximately 2,000 feet of elevation gain and descent, offering runners stunning views of the Horsetooth Reservoir and the Rocky Mo..

The Snow Mountain Ranch Trail Running Festival, taking place in Granby, Colorado, offers a stunning backdrop for runners of all levels. Participants can choose from various race distances, including a 50K, 33K, Half Marathon, 10K, and 5K, all set against the picturesque scenery of rolling hills and ..

The Red Feather Trail Jamboree is a three-day trail running event scheduled for September 26-28, 2025, in the scenic Red Feather Lakes region of Northern Colorado. Organized by trail runners for trail runners, the event features multiple race distances, including a 50-mile, 50K, and half marathon, a..