Colorado
Colorado Obstacle Race Calendar 2025-2026
Monthly updates for Colorado
Get new running races (and updates) in your inbox every month.
Explore the best obstacle runs in Colorado for 2025-2026! Our updated list features 4 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!
February 2026
Join CEROX + IRON on Saturday, February 28, 2026 in Frederick, Colorado for a high intensity test that blends 400 meter runs with eight full body fitness zones. Enter solo or as a two person team or try Cerox Iron without the running.
May 2026
Take on the Colorado Springs Spartan Trifecta Weekend May 30 to May 31 at Fort Carson high in the Rockies. Rugged trails, steep climbs and dozens of obstacles across Sprint to Ultra distances promise a challenging, fun weekend for racers and teams.
Challenge your fitness at the 2026 Denver DEKA FIT & Ultra on May 30 at Gaylord Rockies in Aurora, CO. Tackle a 5 km course with 10 fitness zones, or step up to the Ultra, with volunteer perks and service member discounts available.
September 2026
Tough Mudder Colorado at Fort Carson on September 26, 2026 invites teams and solo runners to tackle a rugged trail obstacle course with iconic challenges. Mudder Village brings live music, food vendors and spectator fun for the whole crew.