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 some of Tough Mudder’s most intense obstacles, including Everest, Kiss of Mud, and 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 an overnight pit area with amenities like hot water heaters, microwaves, and snacks. Finishers earn exclusive headbands, bibs, mileage patches, and medals symbolizing their grit and perseverance through this extreme mud run. 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, strength, and teamwork. Participants navigate muddy, thigh-burning trails and iconic obstacles like "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, making it a memorable experience for athletes and supporters alike. 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 can choose from multiple distances: the Sprint (5K with 20 obstacles), Super (10K with 25 obstacles), Beast (21K with 30 obstacles), and the Ultra (50K with 60 obstacles), plus a kids' race. The course features steep climbs, rugged trails, and muscle-testing obstacles at high altitude, providing a rigorous test of endurance and mental toughness. The event fosters a spirited atmosphere, ideal for teams and individuals seeking a demanding and inspiring race experience in a historic military setting. Visit the organization's website for the most recent information.