Colorado Mud Run & Obstacle Race Calendar 2025-2026

If you're an adrenaline junkie, fitness enthusiast, or simply seeking a thrilling outdoor adventure, you've arrived at the perfect destination. Our meticulously curated calendar is your gateway to the most exhilarating and challenging mud runs and obstacle races taking place in 2025 and 2026.

Prepare to conquer mud-slicked trails, scale towering walls, navigate through grueling obstacles, and push your physical and mental boundaries. Our mission is to provide you with all the essential information you need to plan your race year, including dates, locations, race details, and registration information.

Tough Mudder - Toughest Mudder Colorado

Fort Carson • 27 Sep 2025

5 Mile

Toughest Mudder Colorado, held at Fort Carson, is a grueling 12-hour overnight endurance event scheduled for September 27, 2025. Participants tackle a challenging 5K course filled with extreme obstacles such as the greased 13-foot Everest quarterpipe, the barbed wire Kiss of Mud, and the water-filled Cage Crawl. The event offers individual and team relay formats with age group categories and awards. Despite the overnight timing, the atmosphere is supportive and well-equipped, featuring a dedicated pit area with amenities like hot water heaters and snacks. Finishers earn exclusive headbands, bibs, mileage patches, and medals symbolizing their grit and perseverance. Visit the organization's website for the most recent information.

Tough Mudder - Colorado

Fort Carson • 27-28 Sep 2025

5 km 15k

Tough Mudder Colorado 2025 takes place at Fort Carson, offering participants a challenging obstacle course set against stunning Rocky Mountain views. The event features two race options: a 15K with over 20 obstacles and a 5K with 12+ obstacles, both designed to test endurance and teamwork through muddy, thigh-burning trails. Notable obstacles include "Kiss of Mud," "Electroshock Therapy," and "Pitfall." Finishers earn a medal, shirt, headband, and a celebratory drink. The event fosters a spirited atmosphere with a Mudder Village festival, spectator access, and VIP group packages. Volunteers can participate for free, enhancing the community-driven experience. Visit the organization's website for the most recent information.

Colorado Springs Spartan Trifecta Weekend

Fort Carson • 30-31 May 2026

Kids Race 1-3km Sprint 5k ... Beast 21k Ultra 50k

The Colorado Springs Spartan Trifecta Weekend, held at Fort Carson Army Base, offers a challenging obstacle course race set against the stunning backdrop of the Rocky Mountains. Participants face steep climbs, rugged trails, and muscle-testing obstacles at an altitude over a mile high, providing a rigorous test of endurance and mental toughness. The event features multiple race distances including the Sprint (5K with 20 obstacles), Super (10K with 25 obstacles), Beast (21K with 30 obstacles), and Ultra (50K with 60 obstacles), plus a kids' race. The course is known for its tough terrain and inspiring military setting, making it a unique and demanding experience for racers. Visit the organization's website for the most recent information.