Thunder Chicken 100K Stage Races
Eureka, United States • 15-17 May 2026
Thunder Chicken 100K Stage Races
The Thunder Chicken 100K Stage Races take place over three days at Greensfelder County Park in Wildwood, Missouri. This event utilizes the trail systems within western St. Louis County, specifically connecting Greensfelder Park, Rockwoods Reservation, and Rockwoods Range.
The terrain consists of rugged forest trails featuring various technical elements. Runners encounter winding paths, significant climbs and descents, and several creek crossings. The route also passes through dense woodlands and alongside scenic vistas and bluffs.
Participants compete in three distinct stages over consecutive days:
- Stage 1: Approximately 21 miles through the Rockwoods Range.
- Stage 2: Approximately 26 miles through the Rockwoods Reservation.
- Stage 3: Approximately 25 km through Greensfelder Park.
The event is based at the Beulah Shelter within Greensfelder County Park. The organizers maintain a sustainability program and offer a program to waive registration fees for runners from specific communities through a partner fund. Visit the organization's website for the most recent information.