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 9 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!
May 2026
Take on a torch-lit obstacle course at night. This event near Chicago features technical rigs, heavy carries, and archery, all under the lights. Stick around for post-race festivities including bonfires and live entertainment.
An obstacle course event at Byron Motosports Park honoring military, veterans and first responders. Multiple race options include 10K, 5K, ruck, kids course and team entries organized by the Frontline OCR Foundation.
July 2026
Spartan DEKA Chicago brings a functional fitness challenge to Navy Pier's indoor halls overlooking Lake Michigan. Participants tackle a 5 km course with 10 fitness zones across multiple formats over three days.
August 2026
The Highlander Assault is a Scottish-themed obstacle race featuring 5k and 15k courses with classic obstacles like monkey bars and unique challenges like archery. A 3k family event and separate night and haunted runs are also offered. All finishers g..
Hill of a Race on August 15, 2026 in Bloomington, IL offers an Endurance Challenge, competitive men's and women's divisions including master's 40+, and a series of recreational waves over an obstacle course.
Tough Mudder Chicago on August 29, 2026 at Rockford International Airport offers 5K, 15K and an up to eight hour Infinity format across fields, trails and creek crossings, plus Mudder Village, named obstacles, and finisher rewards.
September 2026
A multi format endurance event on Decker Farm near Cuba, Illinois offering 4, 12 and 36 hour challenges that combine farm chores, trail running and strength tasks with specific required gear and strict crew rules.
Midwest OCR at The Cliffs Insane Terrain Off-Road Park near Marseilles, IL offers 5K and 10K obstacle courses, a competitive 10K Elite with cash prizes, a three lap Bearded Challenge, ruck options, and a kids course.