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5K races in St. Charles County (2026-27)
Updated
6 5k races are 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. 11 5k races are listed in St. Charles County for the next 12 months; the next one starts from $75.
All St. LouisSt. Louis & Inner Suburbs (30)West County & Chesterfield (14)St. Charles County (11)Metro East (Illinois) (14)
By date
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Sun Nov 8 · 7:30 AM · Saint Charles · St. Charles County
5K10KHalf marathonMarathon
from $75Sign up ↗ -
Sat Dec 5 · 9:00 AM · Defiance · St. Charles County
1 mile5K10K
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Sat Dec 19 · 9:00 AM · St Peters · St. Charles County
1 mile5K10K9.3 miles
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Sat Jan 23 · 8:30 AM · O'Fallon · St. Charles County
5K · Feb 64 miles · Jan 305 miles
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Sat May 1 · 9:00 AM · Augusta · St. Charles County
1 mile5K10KHalf marathonTrail
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Sat May 15 · 7:00 AM · Saint Charles · St. Charles County
5K10KHalf marathonTrail
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Sat Jul 3 · 7:30 AM · St Charles · St. Charles County
5K10KHalf marathonTrail
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Sat Oct 30 · 8:45 AM · Cottleville · St. Charles County
1 mile5KTrail
from $27.50Reg. closed
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Quick answers
How many 5k races are in St. Charles County in the next 3 months?
6 5k races are 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 5K in St. Charles County right now?
Cabin Fever Winter Running Series on January 23 has the lowest listed entry fee in the next 90 days: $20. Prices are before the registration platform's processing fee.
When does the next early-bird price end for 5k races in St. Charles County?
Candy Cane Course - St. Louis: the 5K goes from $40 to $44 after November 29. 6 more of these 5k races publish a later price increase.
Are there 5k races in St. Charles County this weekend?
Yes, 1: MO' Cowbell Marathon/Half-Marathon/10K/5K (Sun).