Castle Rock
Trail Running Calendar near Castle Rock 2026-2027
Explore the top trail runs near Castle Rock 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
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.
A backyard ultra at Bear Creek Lake Park where runners repeat a 4.167 mile loop every hour until one remains, up to 11 laps, with a 50 runner field cap.
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
Inaugural 21.6 mile out and back on Rampart Range Road near Sedalia, CO, with 2,627 feet of climbing, winter road surfaces, mandatory gear, and multiple aid stations.
April 2027
A backyard ultra on public trails in Greenland Open Space near Larkspur, Colorado, run as repeated 4.167 mile loops until one runner remains.
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 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.