Illinois
Illinois Obstacle Race Calendar 2026-2027
Monthly updates for Illinois
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Explore the best obstacle runs in Illinois for 2026-2027! Our updated list features 8 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 at the Dark Ages Night Race, an action packed evening of rigs, heavy carries and archery. Finishers earn a medal and shirt while bonfires, music and food fuel the after race party.
Frontline OCR on May 23 at Byron Motorsports Park challenges athletes with purpose built obstacles honoring military, veterans and first responders. Choose from 10K Elite, 5K, Ruck or a kid's course for all ages and abilities.
July 2026
DEKA FIT at Navy Pier in Chicago on Jul 10-12, 2026 is a hybrid fitness race with a roughly 5 km course and 10 fitness zones. Tickets start at $60 and a volunteer program and service member discount are noted.
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 on Aug 29, 2026 brings muddy obstacle course fun to Rockford Airport with fan favorites like Berlin Walls and Arctic Enema. Chill in Mudder Village with food, live music and finisher swag after the 5K, 15K or Infinity.
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.
MIDWEST OCR at The Cliffs delivers a rugged obstacle course set among hills, cliffs, ravines, creeks and trails with options from kid friendly laps to challenging multi lap events. Every finisher gets a shirt, medal and pro action photos.