Thunder Chicken 100K Stage Races
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Thunder Chicken 100K Stage Races
Thunder Chicken 100K Stage Races is a three-day trail running stage race held May 15 to May 17, 2026 at Greensfelder County Park, Beulah Shelter, 4515 Hencken Road, Wildwood, Missouri. The event takes place in western St. Louis County and is presented by Terrain Trail Runners.
Over the weekend participants follow routes that use trail systems in Rockwoods Reservation, Rockwoods Range and Greensfelder park systems. The courses traverse winding singletrack with sustained climbs and descents, several creek crossings, and passages past scenic vistas and bluffs through dense forest. The event is described as St. Louis’s only three-day trail running stage race.
Stage distances are listed as:
- 21-ish miles Stage 1 Tour de Rockwoods Range
- 26-ish miles Stage 2 Tour de Rockwoods Reservation
- 25K-ish Stage 3 Tour de Greensfelder
Registration information is provided for the race and the Trail Mix Fund may waive registration fees for applicants from BIPOC or LGBTQ+ communities. Reports and photo galleries from prior editions are maintained by the organizer. Visit the organization's website for the most recent information.
