MO' Cowbell Marathon
MO' Cowbell Marathon offers a flat-to-rolling St. Charles Boston qualifier with Missouri River paths, historic streets, and loud cowbell-themed support.
Every link above goes to the race, its timing provider, or an official registration partner. Last checked July 21, 2026.
Quick facts
- Certified Boston qualifier in St. Charles.
- Missouri River and historic district scenery.
- Marathon, half, 10K, and 5K festival with pace support.
About the MO' Cowbell Marathon
MO' Cowbell is a large regional race weekend in St. Charles, Missouri, with marathon, half marathon, 10K, and 5K events. Its playful theme sits on top of serious race production.
Course
The course combines paved roads and riverfront trail sections near historic St. Charles. Long flat stretches favor rhythm, while several rollers and turns interrupt the pace.
Race-day weather
Early November usually begins cool and can warm into comfortable racing weather. River wind, frost, or rain can make exposed sections feel colder.
Past MO' Cowbell Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, November 8, 2026 | Upcoming | — |
| 2025 | Sunday, October 5, 2025 | Completed | Open results |
| 2024 | — | Completed | Open results |
MO' Cowbell Marathon FAQ
When is the MO' Cowbell Marathon?
The 2026 MO' Cowbell Marathon is on Sunday, November 8, 2026.
How do I register for the MO' Cowbell Marathon?
Registration for the 2026 MO' Cowbell Marathon has not been posted yet.
Can I use the MO' Cowbell Marathon for Boston qualifying?
Marathon Scout marks the MO' Cowbell Marathon as a Boston qualifier. Check the current Boston qualifying times and confirm current certification with the race before registering.
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