Castle Rock
Trail Running Calendar near Castle Rock 2026-2027
Explore the top trail runs near Castle Rock for 2026-2027! We've gathered 25 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
December 2026
January 2027
A winter 21.6 mile out and back to Devil's Head near Sedalia, CO, run on the closed Rampart Range Road with aid stations, mandatory gear, and a 200-runner field.
February 2027
March 2027
Winter endurance laps on a marked 4.6 mile loop at Staunton State Park with 3, 6, 12 and 24 hour formats and fundraising for air quality nonprofits.
April 2027
A backyard ultra on a 4.167 mile dirt loop at Greenland Open Space, Larkspur CO, where runners repeat hourly yards until one runner finishes an extra loop alone.
Trail races near Highlands Ranch on dirt and single-track trails, offering 21-mile, half-marathon, 10K and 5K distances with rolling hills and aid station support.
May 2027
Trail ultramarathons in Buffalo Creek, Colorado on May 22, 2027 offering 50 mile and 50 km courses on mostly singletrack with aid stations and limited crew access.
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.
June 2027
An overnight full moon trail event in Highlands Ranch offering 12 hour solo and team relays on a 10.3 mile loop with aid stations and required headlamps.
August 2027
Trail run at Rampart Reservoir on August 14, 2027 with 8 miles and 16 miles options, a 150 runner limit, water only aid stations, and limited parking.
September 2027
A 24 hour loop race on a 0.82 mile course at 7,240 feet in Palmer Lake, CO with overall awards, buckles for 100 miles, and a donation per entry.