Marathon • Half-Marathon • 10K • 5K   |   Historic St. Charles, Missouri   |   Sunday, October 1, 2023

Race Registration

We heard you, the 10K was what so many runners were looking for. So many that it sold out, TWICE! Back again in 2023 is the new 10K alongside the full, half, and 5k. Which distance will be perfect for you this year?

We don’t know about you, but we’re extremely excited for MO’Cowbell ’23!

Registration DatesFullHalf10K / SOLD OUT!5K / SOLD OUT!
March – April$100$80$65$45
May – July$105$85$70$50

Race Registration — pay by credit card for the lowest processing fees, immediate confirmation, and quick access to your runner profile! 

Can’t make it to MO’Cowbell, the flattest and fastest race in the St. Louis region? We will miss you but you can still be part of the fun! Sign up today as a Virtual Runner

Virtual Runner (Mail Bib & Medal)Virtual Runner (Mail Bib, Medal & Shirt)

Terms & Conditions
Sale and/or transfer of race entries/bib numbers is strictly prohibited. All entry fees are non-refundable. Registration may be deferred toward a future event with MO’ Cowbell approval prior to race day.  Contact us directly at

Race officials may cancel, delay or change the event in case of extreme weather or other conditions that may affect the safety and health of the participants. In the event of race cancellation, refunds will not be issued. Sale and/or transfer of race entries/bib numbers is strictly prohibited.

Sunday, October 1, 2023REGISTER NOW