Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 149 exciting trail runs across the region. Find your next trail run in Colorado below and join the trail community at these great events!
November 2026
Trail races at Starsmore Visitor and Nature Center; 4 mile is chip timed and 2.5 mile is not chip timed, with proceeds supporting Friends of Cheyenne Cañon.
Trail races in Louisville, Colorado on November 14, 2026 offering 13.1 miles, 10K and 5K out-and-back courses on dirt trails with aid stations and drop bag service.
Trail event in Loveland featuring a Heavy 15K loop and a 5K over varied, technical terrain; the 15K has a five-hour limit.
Four trail races across local parks with increasing distances, chip timing, included swag, and series awards for runners who complete all four events.
A no‑fee, self-supported 50K in Golden, Colorado featuring four loops from Parfet Park up South Table, North Table, Mount Galbraith and Lookout Mountain.
A themed running event in Arvada on November 21 2026 offering 13.1, 10K, 5K and 2K courses with optional eggnog, hay bale and pumpkin pie challenges.
Trail-run event in Colorado Springs on November 21, 2026 offering 50k, half marathon and 10k with dirt trails, stocked aid stations, and significant elevation.
Four trail races across local parks with increasing distances, chip timing, included swag, and series awards for runners who complete all four events.
A family friendly Turkey Trot in Buena Vista with a mostly flat 5K at 8,000 feet, stroller access, finishers awards, and a local food pantry drive.
A fundraising 5K and youth 5K on November 29, 2026 in Colorado Springs benefiting the Colorado Springs Amateur Hockey Association.
December 2026
Mountain trail race at Staunton State Park offering 50k, 16 mile and 8 mile courses, time limits, shuttle parking and variable December weather.
A limited 40-runner mountain ascent at Thumb Open Space: repeated 2 km laps with 540 ft gain, poker-chip turnarounds, and patch milestones for 14, 18, and 26 ascents.
Nighttime uphill race and gondola ride to the Aspen Mountain summit with fundraising, a post summit party, and a virtual option.
Free 2.8 mi festive run in Broomfield that finishes with breakfast at La Belle French Bakery and is open to all ages.
Santa Claus Run in Louisville CO on Dec 12 offers 5k, 10k, a half marathon and a kids race with an expo, festive finish gifts and on-course amenities.
A 10K at the YMCA of the Rockies on December 19, 2026, with trail and paved sections and nearly 1,500 feet of climbing; breakfast and a day pass included.
January 2027
A trail event from Norris-Penrose Events Center into Bear Creek Park East offering 5K and 10K distances with online registration and a $30 fee.
A winter out and back 21.6 mile race near Sedalia CO with 2,627 ft of climbing, mandatory gear, aid stations, and a 200 runner field limit.