Illinois
Illinois Obstacle Race Calendar 2025-2026
Monthly updates for Illinois
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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 torch light through illuminated obstacles at the Dark Ages Night Obstacle Race, where technical rigs, heavy carries and archery test your grit. Finish the night with live entertainment, bonfires, food and a medal and t shirt.
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
Embrace your inner Highlander at the Highlander Assault obstacle race in McHenry Illinois on August 15 2026, featuring 5k, 15k and a 3k Family Frenzy with rugged obstacles and themed Scottish fun. Finishers earn a medal and shirt.
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.