Illinois
Illinois Obstacle Race Calendar 2025-2026
Explore the best obstacle runs in Illinois for 2025-2026! Our updated list features 7 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!
May 2026
Run by torchlight through illuminated obstacles and rugged rigs at the Dark Ages Night Obstacle Race in McHenry. Enjoy bonfires, live entertainment and a finisher medal and shirt after a thrilling night of archery and heavy carries.
Frontline OCR at Byron Motosports Park on May 23, 2026 honors military, veterans, and first responders with purpose built obstacles that test physical and mental grit with no scheduled breaks. Choose from 10K, 5K, ruck and a kids course.
August 2026
Challenge yourself at the Highlander Assault Obstacle Race in McHenry on August 15, 2026, an award winning OCR with 3k family, 5k and 15k options and day and night formats. Expect rugged obstacles, festival vibes and medals for finishers.
Tough Mudder Chicago returns Aug 29 and 30 at Rockford International Airport with muddy 15K and 5K obstacle courses and an Infinity eight hour lap format. Enjoy Mudder Village, finisher swag and a post race beer or seltzer.
September 2026
Test your limits at The Ultimate SUCK, an on farm endurance challenge in rural Illinois with 36 hour, 12 hour and 4 hour formats. Camp by the course, push through the night, and celebrate with a bonfire and breakfast.
Take on rugged hills, cliffs, ravines and wooded trails at MIDWEST OCR with 5K and 10K obstacle courses plus ruck divisions. All finishers get a shirt, medal and pro action photos, and the race is veteran owned.