Chicago 7/11 Hour Endurance Run
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CHICAGO 7-11 Hour Endurance Run
The Chicago 7/11 Hour Endurance Run is scheduled for May 15, 2027 in Willow Springs, Illinois. The event is organized by Yeti Trail Runners. Registration opens January 22, 2027 at 12:00 AM CT.
Distances:
- 7 hour endurance run
- 11 hour endurance run
The course uses a roughly 4-mile loop at Wolf Road Woods within the Palos Preserves. Course features include single-track under a restored forest canopy, double-track through preserve areas, rolling hills, and short runnable sections. Nearby natural features mentioned include ponds, Maple Lake, and Saganashkee Slough.
A central aid station supplies a range of snacks and drinks. Listed items include gourmet hot dogs, Pixie Sticks, honey buns, crackers and chips, plus water and electrolyte drinks. Participants may bring personal coolers to accommodate dietary preferences.
Timing services are provided by Zen Arcade Timing with chip timing, live lap counting, splits, and real-time tracking. Awards are noted for categories in both race durations. Visit the organization's website for the most recent information.
