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 7 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!
May 2026
Obstacle course weekend at Fort Carson near the Rocky Mountains, with Sprint 5K, Super 10K, Beast 21K and Ultra 50K races plus kids events and an obstacle workshop. The high elevation course features steep climbs, rugged trails and multiple obstacles..
June 2026
Muddy Dash in Denver is a 5K mud run at Colorado National Speedway on June 20, 2026, featuring obstacles, mud pits no deeper than waist level, a pre-party with music, and an after-party with food and beer. Family friendly with standard and VIP option..
Test your strength at this exclusive obstacle course event in Peyton featuring a three lap 3K race and a one mile kids run. Navigate rigs, rope climbs, and heavy carries in a small field of only fifty athletes.
Experience a half marathon in the mountains of Nederland Colorado. This event features a significant elevation gain of 4226 feet with the summit always in view.
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.
An outdoor Tough Mudder event at Fort Carson on September 26, 2026 offering 15K and 5K obstacle courses, spectator access, group packages, finisher medals and apparel, plus parking and volunteer options.