Endurance Grid lists 8 obstacle course races in Illinois, from September 2026 to August 2027 across 7 cities.
The obstacle course race calendar in Illinois is busiest in May, September, and June, with races most often in Palatine, Rockford, and Springfield.
Obstacle course races (OCR) combine running over varied terrain with a series of physical obstacles — walls, rope climbs, monkey bars, carries, and crawls. Courses range from a 5K with under 20 obstacles up through 10Ks, half-marathons, and beyond, depending on the organizer and race series.
The barrier to entry is lower than it looks. Most events run open heats designed so beginners can finish — with help on the obstacles when they need it, and strangers often boosting each other over the walls.
Enter your email and we'll send more your way.
Endurance races in Illinois happening in the next 7 days, in date order. Browse what’s coming up and sign up soon.