Trail Running calendar near Aurora 2025-2026

The Pikes Peak Road Runners Fall Series is a challenging cross country trail running event held in Colorado Springs, Colorado. It features four races of increasing distances—3.8 to 7.4 miles—across diverse city and county parks including Bear Creek Terrace, North Monument Valley Park, Piñon Valley P..

The Blue Sky Trail Marathon and Half Marathon are scheduled for October 18-19, 2025, in Fort Collins, Colorado. The event features a scenic course through trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, offering a mix of dirt singletrack, rocky terrain, and gravel paths...

The Great Trailhead Foot Race 10 Miler, held at Bear Creek Lake Park in Lakewood, Colorado, offers runners a scenic trail experience with single-track dirt paths against the backdrop of Denver's skyline. Participants can choose between a 5-mile or a challenging 10-mile double-lap course. Registratio..

The Indian Creek Trail Runs, part of the Human Potential Running Series, is an annual fall trail running event held at Indian Creek Campground in Sedalia, Colorado. Celebrating its 12th year in 2025, the race offers multiple distances: 5-Mile, 15-Mile, 55k, and 50-Mile, with time limits of 12 to 14..

The Bobcat Trail Race, held in Palmer Park, Colorado Springs, is a celebrated urban trail running event showcasing the park's rugged beauty and panoramic views of the city and Pikes Peak. Organized by Aravaipa Running since 2024, it offers four distances: 50K, 25K, 10K, and 5K, catering to a range o..

The Beware The Bear Trail Races, held at Bear Creek Lake Park in Lakewood, CO, offers a variety of race options including a 5km, 15km, and a kids' 1km run. The courses feature mostly dirt trails with a mix of steep hills and rolling terrain, making it suitable for both beginners and experienced trai..

The Colorado 24 Hour Run is an exciting endurance event taking place in Fort Collins, Colorado, featuring various race formats including 24-hour, 12-hour, and 6-hour runs, as well as relay options. Participants can challenge themselves to see how far they can run within their chosen time frame on a..

The Bingo! Trail Party is an annual trail running event held at May Farms in Byers, Colorado, organized by the Human Potential Running Series. It features multiple race levels, ranging from 6 to 62 miles, with participants running loops on scenic, mostly flat trails and farm roads. The unique format..

The HRCA Backcountry Wilderness Half Marathon is an annual trail race held in Highlands Ranch, Colorado, featuring a challenging 13.1-mile course that showcases stunning landscapes. Participants navigate through dirt, gravel, and singletrack paths, with opportunities to encounter local wildlife. The..

The Louisville Trail Race, held annually in Louisville, Colorado, features a half marathon, 10K, and 5K on scenic front range trails. Celebrating its 12th year, the event offers mostly dirt trail courses with gentle elevation gains and challenging hills that provide stunning views of the Flat Irons..

The Colorado Cold Rush Ultra is a winter trail running event held in Colorado Springs, featuring distances of 50K, half marathon, and 10K. The race offers a scenic and challenging course that includes historic High Drive and the tunnels from the Colorado gold rush era. The 50K starts at Bear Creek R..

The Thumbs Up Vertical Challenge is an 8-hour ascent race held in Estes Park, Colorado, on the Thumb Open Space trail. Participants run a 1 km out-and-back course with a steep 540-foot elevation gain per ascent. Runners collect poker chips at the turnaround point to track their completed ascents, wh..

The Sawmill Trail Runs, part of the Human Potential Running Series, is an annual trail running event held at Staunton State Park in Pine, Colorado. The event features three distance options: a 50k, a 16-mile, and an 8-mile race, catering to various skill levels. With a runner capacity of 250, the ev..

The USCSA Cross Country Ski Racing Festival is a premier event held at Snow Mountain Ranch Nordic Center in Granby, Colorado, scheduled for January 24-25, 2026. It features races for collegiate, high school, and middle school athletes, including classic and skate sprint events. The festival attracts..

The Stories Trail Runs is an annual winter trail running event held in Colorado Springs, CO, featuring a stunning backdrop of Cheyenne Mountain and Pike’s Peak. Participants can choose from various timed events, including 15-hour, 30-hour, and 6-hour challenges, as well as shorter distances like a 1..

The Winter's End Snowshoe Races, held at Granby Ranch Resort in Granby, Colorado, offer a unique winter running experience on mostly groomed single and double-track trails. The event features multiple distances including a marathon, 14-mile, 7-mile, and 5k races, accommodating runners of all skill l..

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