Illinois 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.

Frontline OCR

Byron • 24 May 2025

Endurance

The Frontline OCR will take place in Byron on Saturday 24 May 2025.

Savage Race - Chicago

Spring Grove • 28 Jun 2025

Saturday Only 15-20 Obstacles 3+ Miles Register For Savage Blitz Saturday Only 25+ Obstacles 5-7 Miles

The Savage Race - Chicago will take place in Spring Grove on Saturday 28 June 2025. You can run between 3 and 7 miles.

Tough Mudder - Chicago

Rockford • 23-24 Aug 2025

Infinity 5 km 15k

Tough Mudder Chicago 2025 is set to take place at Rockford International Airport on August 23 and 24. This challenging mud run features over 20 obstacles designed to test participants' strength, endurance, and teamwork. Participants can choose from various event formats, including a 15K, 5K, and the Tough Mudder Infinity, which allows for multiple laps.

Each finisher receives a medal, a finisher shirt, and an iconic headband, along with a complimentary drink to celebrate their achievement. Spectators can enjoy the Mudder Village Festival, featuring live entertainment and local food. Registration is available online. Visit the organization's website for the most recent information.

Midwest OCR

Marseilles • 27 Sep 2025

5 km 10k

The Midwest OCR is an exciting obstacle course race taking place in Marseilles, Illinois, offering participants a choice between a 5K or 10K course. The event features both a Just-for-Fun division and a competitive 10K Elite category, catering to various skill levels. Additionally, participants can challenge themselves further with the Bearded Challenge, which involves completing multiple laps. This event promotes teamwork and fun, encouraging runners to conquer obstacles together. The Midwest OCR is set to take place in the Chicagoland area, making it a thrilling experience for both competitive and casual racers. Visit the organization's website for the most recent information.