Chicago 11 Hour Endurance Run
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Event
The Chicago Yeti 7/11 Hour Endurance Run is scheduled for May 16, 2026, at Wolf Road Woods, 9800 Wolf Rd, Willow Springs, IL. The event offers two timed endurance options:
- 7-Hour Endurance Run
- 11-Hour Endurance Run
Awards are given in categories for both durations. Registration opens January 1, 2026.
Course
The event uses a looped trail course of 4 miles per loop within the Palos Preserves / Palos Trail System. The route includes single-track and double-track sections, rolling hills, and some runnable stretches. Trail markings are provided. A GPX file for the course is available on UltraPacer.
Aid station and equipment
A central aid station serves runners with water, electrolyte drinks, and a variety of packaged snacks including hot dogs, pixie sticks, honey buns, crackers, and chips. Participants are required to bring a reusable cup because the event is cupless.
Timing and policies
Timing and lap counting are provided by ZEN ARCADE TIMING, with chip timing and live lap displays. The event publishes inclusion and AWD (Athletes With Disabilities) criteria: athletes must be able to run the course, tethers may be used for visually impaired athletes, prosthetics are allowed, and crutches/braces/poles may be permitted with organizer approval; the course is not considered suitable for wheelchairs. The event policy states no refunds, deferrals, or transfers. Visit the organization's website for the most recent information.
