Colorado
Colorado Obstacle Race Calendar 2026-2027
Monthly updates for Colorado
Get new running races (and updates) in your inbox every month.
Explore the best obstacle runs in Colorado for 2026-2027! Our updated list features 6 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!
June 2026
A family-friendly *5K* mud run at Colorado National Speedway on June 20, 2026, with obstacles, waist-deep mud pits, slides, a pre-party and an after-party with music and food. Registration tiers include standard and VIP options.
Operation HAYSTACK is a half marathon in Nederland, Colorado on June 27, 2026. The course covers 13.1 miles with 4,226 ft of elevation gain and the listed entry price is $105 plus tax.
August 2026
Summit Grays and Torreys Peaks in this 8.8 mile Colorado endurance event. Participants must carry a 20lb dry load while tackling 4,101 feet of elevation gain.
September 2026
A load bearing endurance event at Staunton State Park on September 5, 2026. Routes range from 6.5 to 21.5 miles with loads from 10 to 40 lb and proceeds benefit the Special Forces Foundation.
Tough Mudder Colorado on September 26, 2026 at Fort Carson offers 15K and 5K obstacle courses with named obstacles and finisher items, plus spectator passes and group or volunteer options.
May 2027
Weekend of obstacle races at Fort Carson with Sprint, Super, Beast and Ultra distances, plus kids races and spectator access. The courses use high elevation terrain with steep climbs and rugged trails.