Trail Running calendar near Castle Rock 2026-2027

A high alpine 50k in Nathrop, Colorado on September 27, 2026. The 33 mile course gains about 7,000 feet, runs largely on singletrack and the Colorado Trail, and includes three aid stations and an 11 hour cutoff.

Bear Chase Trail Race is a two day endurance festival at Bear Creek Lake Park with distances from 5K to 100K on scenic single track trails. Ultras race Saturday, shorter events Sunday, and proceeds help Lakewood open space and trails.

Run Wildcat Mountain near Littleton with 10 mile, 10K and kids races on rolling dirt trails and wide mountain views. Finishers get a dry fit shirt, medal, pancake breakfast and post race beers.

A fall trail race in Woodland Park, Colorado offering 50K and 10K courses with Rampart Reservoir singletrack and sustained views of Pikes Peak. Aid stations provide hot and cold options and crewing is allowed for the 50K.

On October 3, 2026 runners can choose a 5K road race, an 8 mile trail, or a 13.1 mile trail half marathon near the Royal Gorge Bridge. The weekend also includes a free kids Dinosaur Dash and a virtual race option.

A four-race fall cross country series across Colorado Springs parks with trail distances from 3.8 to 7.4 miles, chip timing, and series awards given after completion of all four races.

Run scenic single track trails through lodgepole pine, aspen groves and red rock views at the Indian Creek Trail Runs in Sedalia, Colorado. Choose from 50 mile, 55k, 15 mile or 5 mile distances with stocked aid stations and finisher medals.

Take on technical single track trails, rolling hills and rocky bluffs at Palmer Park with 50K, 25K, 10K and 5K options. Enjoy city and Pikes Peak views while testing your trail skills at this Aravaipa Running event.

A trail race at Bear Creek Lake Park in Lakewood offering a 5-mile option and a 10-mile double lap, with park admission, post-run food and drinks included, free beer for those 21+ with ID, and a finisher mug for 10-mile finishers.

A four-race fall cross country series across Colorado Springs parks with trail distances from 3.8 to 7.4 miles, chip timing, and series awards given after completion of all four races.

Trail races at Bear Creek Lake Park offering 5 km, 15 km, a 5 km plus 15 km double, and a Kids 1 km. Main race registration includes socks or a neck gaiter and a pancake breakfast while kids receive a stuffy at the finish.

A late season trail event in Cañon City that offers 10K, 35K, 50K and a 35 mile single loop along the Arkansas River and through Royal Gorge Mountain Park with a summit at 7,109 feet and varied aid station support.

A four-race fall cross country series across Colorado Springs parks with trail distances from 3.8 to 7.4 miles, chip timing, and series awards given after completion of all four races.

Nov 7, 2026 in Lone Tree CO, tackle a scenic single loop 13.1 mile course on dirt and singletrack through Highlands Ranch Backcountry Wilderness. Aid stations, tech shirt, finisher medal, pancake breakfast, post race beer and cash prizes.

Join the Louisville Trail Race on November 14, 2026 in Louisville, Colorado, with half marathon, 10K and 5K trail distances over scenic dirt paths and rolling climbs. This cupless race offers timed courses for all levels.

A four-race fall cross country series across Colorado Springs parks with trail distances from 3.8 to 7.4 miles, chip timing, and series awards given after completion of all four races.

The Colorado Cold Rush Ultra will take place in West Colorado Springs on Saturday 21 November 2026. You can run between 10 and 50 kilometers.

A four-race fall cross country series across Colorado Springs parks with trail distances from 3.8 to 7.4 miles, chip timing, and series awards given after completion of all four races.

The Sawmill Trail Runs will take place in Pine Junction Area on Saturday 5 December 2026. You can run between 8 and 50 kilometers.