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  • Home
  • About
    • Race Director
    • Sponsors
    • Blogs
    • SUSTAINABILITY
    • Trees for Tees Program
    • 2026 Photography/Videography Internship
  • Podcast
  • Contact Us
  • Events
  • Coaching
    • Shalini Bhajjan
    • Personal Coaching
    • Group Coaching
  • Volunteer
  • FAQ
  • Shop
  • JOIN THE TTR CHALLENGES
    • THE DOUBLE TAP CHALLENGE
    • TTR - Winter Segment Challenge
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Thunder Chicken 100K Stage Races

​Friday May 2, 2025 - Sunday May 4, 2025

Wyman Center
600 Kiwanis Dr
Eureka, MO 63025
St. Louis's very own three-day trail running stage race - Thunder Chicken 100 Stage Races
Thunder Chicken 100 Stage Races are an annual gathering at Camp Wyman in Eureka, Mo, in western St. Louis County, Missouri. The event was created for many adventure seekers, reuniting for a weekend of challenging races, fellowship and the opportunity to experience some of the best trail running STL has to offer!

Over the course of three days, runners will experience some of the most challenging terrain and scenic trail systems STL West County has to offer! Winding, climbing and descending through the rugged Rockwoods Reservation, Rockwoods Range and Greensfelder park systems with several creek crossings, past scenic vistas and bluffs and through dense forest.

May 2, 2025 - Stage 1 - 21-ish Mi - Tour de Rockwoods Range
May 3, 2025 - Stage 2 - 26-ish Mi - Tour de Rockwoods Reservation
May 4, 2025 - Stage - 25K-ish - Tour de Greensfelder​
Registration information

HELP SEND A YOUTH TO SUMMER CAMP - DONATION MATCH PROGRAM
Camp wyman donation
Terrain Trail Runners-STL Charitable Endeavors: In our efforts to give back to our local community we are adding a Donation Match Program to Thunder Chicken 100 Stage Races!

We will match every dollar donated towards Camp Wyman by runners signing up for the race and making a donation to help send a youth to camp!

Please follow the DIRECT DONATION LINK to make a donation to Camp Wyman under the drop down designation 'Thunder Chicken Ultra Marathon Race' and Terrain Trail Runners will match your donation amount.

*This is not mandatory and is in addition to the registration and entry fees. All donations made are tax deductible!

lodging/camping infoRMATION
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Learn More!
Race Reports
2022 Race Report
by Lisa Kennedy
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Photos
2025
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