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 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
A high-elevation Spartan weekend at Fort Carson offering obstacle races from a kids 1 to 3 km course up to a 50 km Ultra near Pikes Peak. Team and spectator options are available along with GOVX discounts for eligible service personnel.
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 takes place at Fort Carson on September 26 2026 with 15K and 5K obstacle courses, finisher medals and gear, spectator village with entertainment and food, plus volunteer and group packages.