Trail Running Calendar Colorado 2026-2027

A multi-distance trail event on the Castle Rock ridgeline featuring a family obstacle run plus 5K, 10K, half marathon and 50K. Timing, aid stations, shirts and medals are provided and the course reaches about 6,700 feet.

Two trail race options starting and finishing at Camp 4 Coffee in Crested Butte South, on marked single track and dirt roads through the Gunnison National Forest; the event is fully self-supported.

A Halloween themed 3.1 mile trail run in Aspen with dogs welcome, timed results and cash prizes for top male and female finishers. The event features costume prizes, raffle items and food trucks, with proceeds benefiting the local animal sh..

A four-race trail series across city parks with increasing distances, chip timing, and cumulative awards for runners who complete all four events.

A fall trail race at Staunton State Park offering 50K, 25K, a 25K FishSlappers division, and a steep 5K, run on runnable singletrack with aid stations and fundraising for land and water conservation.

Trail races around Indian Creek Campground near Sedalia, CO offering 50-mile, 55k, 15-mile and 5-mile options on single-track montane trails with scenic red rock and aspen views, limited entries, aid stations and on-course support.

A set of trail races at Palmer Park in Colorado Springs offering 50K, 25K, 10K and 5K courses with urban mountain views, marked single-track and aid station support on the longer distances.

Trail marathon and half at Horsetooth Mountain Park on mostly singletrack and redstone hardpack. Two distances with published elevation gain, fully stocked aid stations, drop bag options, and time allowances.

Trail races at Bear Creek Lake Park offering 5 miles or a two-lap 10 miles on single-track dirt. Registration includes park admission, a finisher meal and refreshments; 10 mile finishers receive a commemorative mug.

A four-race cross country series across Colorado Springs parks with increasing distances and varied trail surfaces. Online registration only; awards are based on completing all four races and chip time scoring.

Methodist Mountain Ultra The Methodist Mountain Ultra (MMU) is a trail race set on the Methodist Mountain trail system near Salida, Colorado. It takes place at the northern end of the Sangre de Cristo mountains. The event features two dista..

A single loop trail event in Cañon City with 35 mile and shorter options that follow the Arkansas River, climb to 7,109 feet for Royal Gorge and Pikes Peak views, and feature well stocked aid stations and crew access.

Trail races at Bear Creek Lake Park in Lakewood CO offering 5 km, 15 km, a 5 plus 15 double, and a kids 1 km with a stuffed bear for finishers. Courses are mostly dirt, single and double track, and fully marked.

A four-race cross country series across Colorado Springs parks with increasing distances and varied trail surfaces. Online registration only; awards are based on completing all four races and chip time scoring.

A multi-distance trail ultramarathon in the North Fruita Desert near Fruita, Colorado, featuring fast singletrack and sections on the Zippity Do Da Trail. Courses range from 10 miles to 50 miles with detailed elevation profiles and cupless..

Experience 13.1 miles of singletrack trails and hills in the Highlands Ranch Backcountry Wilderness Area. Enjoy custom medals and a post race pancake breakfast while competing for cash prizes in various categories.

A timed 6, 12, and 24 hour event on a certified one mile dirt loop at Swift Ponds in Fort Collins, featuring full aid, medical coverage, relay options and a registration cap of 300.

Trail races of 13.1 miles, 10K, and 5K run on dirt trails around Louisville Community Park with a notable hill offering views of the Flat Irons. The event includes aid stations, drop bag service, and post race festivities.

A four-race cross country series across Colorado Springs parks with increasing distances and varied trail surfaces. Online registration only; awards are based on completing all four races and chip time scoring.

A late November trail event in Colorado Springs with 50k, half marathon and 10k options across historic High Drive and Gold Camp Road, staffed aid stations, and crew-accessible locations including warm food at Cheyenne Canon.