Home / St. Louis / Marathons / St. Charles County
Marathons in St. Charles County (2026-27)
Updated
1 marathon is coming up in St. Charles County in the next 90 days; the next is MO' Cowbell Marathon/Half-Marathon/10K/5K on Sunday, November 8 in Saint Charles. 1 marathon is listed in St. Charles County for the next 12 months; the next one starts from $75.
All St. LouisSt. Louis & Inner Suburbs (2)St. Charles County (1)
By date
-
Sun Nov 8 · 7:30 AM · Saint Charles · St. Charles County
5K10KHalf marathonMarathon
from $75Sign up ↗
Picking a goal time? Work out your marathon pace and splits →
Quick answers
How many marathons are in St. Charles County in the next 3 months?
1 marathon is listed in St. Charles County between November 7 and February 5. The next is MO' Cowbell Marathon/Half-Marathon/10K/5K on Sunday, November 8 in Saint Charles.
What is the cheapest marathon in St. Charles County right now?
MO' Cowbell Marathon/Half-Marathon/10K/5K on November 8 has the lowest listed entry fee in the next 90 days: $75. Prices are before the registration platform's processing fee.
When does the next early-bird price end for marathons in St. Charles County?
None of these marathons publish an upcoming price increase. Check each race page for its full price schedule.
Are there marathons in St. Charles County this weekend?
Yes, 1: MO' Cowbell Marathon/Half-Marathon/10K/5K (Sun).