Douglas County
Trail Running Calendar near Douglas County 2026-2027
Explore the top trail runs near Douglas County for 2026-2027! We've gathered 26 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
A dog-friendly 2.5 mile loop on a hilly dirt path in Lone Tree raising funds for the Colorado Animal Care Foundation, with prizes for participating dogs.
Indian Creek Trail Runs in Sedalia, Colorado on October 17, 2026 offers multiple trail and ultra distances through montane forests, aspen groves, red rock formations and prairie vistas with city views from several viewpoints.
A two-day weekend of mountain bike races for women and girls, a family run and on-site camping near Elbert, Colorado with youth and adult categories.
A 13.1 mile trail race through the Highlands Ranch Backcountry Wilderness in Douglas County with cash prizes and participant race amenities including a shirt, medal, and pancake breakfast.
November 2026
Six hour timed trail race at Sandstone Ranch in Larkspur, CO with 8 mile loops, aid every four miles, and finisher medals for longer efforts.
December 2026
January 2027
A 21.6 mile out and back road race near Sedalia, CO with 2,627 ft of climbing, variable winter road conditions, mandatory gear, and aid at multiple stations.
April 2027
Trail races on April 10, 2027 near Highlands Ranch CO offering 21 mile, half marathon, 10 km and 5 km on mostly dirt single track with aid stations.
May 2027
Trail races at Mueller State Park from 10k to marathon plus two 12 hour timed events that use colored ball draws to set loop sequences. All courses are single and double track with no pavement and feature an aid station.
Trail races at Farish Recreation Area in Woodland Park, CO feature a Half Marathon, 10K, 5K and a free 1 mile kids run, with awards and packet pickup options.
A May 30 trail ultra in Buffalo Creek, Colorado offering 50 Mile and 50K courses on mostly singletrack with significant elevation and limited crew access.
A Parker, CO trail event featuring a Dipsea-style staggered 10 km and a Kids 1 mile, with a steep incline, rolling terrain, aid stations, and awards for top finishers.
June 2027
Overnight trail endurance event in Highlands Ranch offering solo ultras and 3 or 5 person 12 hour relays on marked 10.3 and 5.3 mile loops with two aid stations.