Trail Running calendar near Golden 2026-2027

A weekend trail running festival at Bear Creek Lake Park offering 100K, 50M, 50K, half marathon, 10K and 5K on mostly singletrack terrain with looped courses, aid stations, drop bags, and controlled crew and pacer rules.

Experience the scenic HRCA Backcountry Wilderness Area with trail races for the whole family. Enjoy rolling hills and open views followed by a pancake breakfast and finisher medals for all participants in Littleton.

A Woodland Park trail event featuring 50k and 10k options on singletrack and forest roads with views of Pikes Peak, stocked aid stations, and crew access for the 50k.

A multi distance trail festival in Castle Rock featuring a family adventure run plus 5K, 10K, half marathon and 50K ultramarathon across Philip S. Miller Park and Ridgeline Open Space. Events include chip timing, finisher medals and aid sta..

A six-hour trail challenge in Littleton where runners complete a 5K each hour for six hours, totaling 18 miles if completed. Trail terrain, hourly elimination, tiered patches and medals, and national leaderboard prizes highlight the format.

A four-race trail series in Colorado Springs with distances that increase each round and varied terrain from grass fields to rocky single track. Chip timing is used and series awards require finishing all four races.

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.

An annual trail running event in Sedalia, Colorado offering 50-mile, 55k, 15-mile and 5-mile courses through montane forests, aspens, and red rock viewpoints, with limited camping, aid stations, and specific mid-race drop down and pacer rul..

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 trail series in Colorado Springs with distances that increase each round and varied terrain from grass fields to rocky single track. Chip timing is used and series awards require finishing all four races.

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 trail series in Colorado Springs with distances that increase each round and varied terrain from grass fields to rocky single track. Chip timing is used and series awards require finishing all four races.

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 trail series in Colorado Springs with distances that increase each round and varied terrain from grass fields to rocky single track. Chip timing is used and series awards require finishing all four races.

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.

A four-race trail series in Colorado Springs with distances that increase each round and varied terrain from grass fields to rocky single track. Chip timing is used and series awards require finishing all four races.