Chicago 11 Hour Endurance Run
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Chicago Yeti 7-11 Hour Endurance Run
The Chicago Yeti 7-11 Hour Endurance Run is a timed trail event held at Wolf Road Woods in Willow Springs, Illinois (9800 Wolf Rd). The event offers two timed durations:
- 7-hour endurance run
- 11-hour endurance run
The course uses a 4-mile loop with a mix of single-track under restored forest canopy, double-track through the Palos Preserves, rolling hills, and some quick runnable sections. The route features pond views and a notable historical landmark near the loop. Professional chip timing and live lap counting are provided by Zen Arcade Timing.
Course support and policies
A branded aid station provides a variety of food and drink options, including hot dogs, sweets, crackers, water, and electrolyte drinks; participants may bring a personal cooler for specific diets. This is a cupless event; each participant must bring a reusable cup for hot or cold drinks. Accessibility provisions state that athletes with disabilities must be able to run the course, may use tethers for visual impairment, may use leg prosthetics, and may use crutches, braces, or poles with race director approval; the course is not suitable for wheelchairs. The event does not offer refunds, deferrals, or transfers. Organizers accept an entrant’s declared gender at registration and provide processes to record non-binary gender and pronouns. Visit the organization's website for the most recent information.