Missouri · Marathon · Half · 10K
MO Cowbell Marathon
MO Cowbell Marathon is a marathon, half marathon, 10K and 5K event held in St. Charles, Missouri. Its next confirmed date is Sunday, November 8, 2026. About 3,000 runners take part across all distances.
- Race day
- November 8, 2026
- Location
- St. Charles, MO
- Field size
- ~3,000 runners
Race details
- Date
- Sunday, November 8, 2026
- Location
- St. Charles, Missouri
- Distances
- Marathon, Half, 10K, 5K
- Field size
- About 3,000 runners
- Course
- Flat / low
- Registration
- runsignup.com
- Official website
- mocowbellmarathon.com
Registration, course & weather
- Registration status
- Open
- Start time
- 7:30 AM CST
- Course profile
- Loop course; Mostly road, some trail; 520 ft gain, 520 ft loss (estimated from third-party elevation data); Boston qualifier
About the MO Cowbell Marathon
A flat, fast multi-distance race in historic St. Charles known for its cowbell-ringing spectators and Katy Trail/riverfront course.
Rankings and notes
- Rankings and awards
- Boston qualifier; USATF-certified; popular flat/fast course
- Notes
- Large St. Charles race weekend.
More marathons in Missouri
Coming up next, by confirmed date.
-
Bass Pro Shops Conservation Marathon & Cohick HalfSpringfield, MOMarathonHalf (Cohick)5KMarathon Relay ~4,000 runners
-
MO' Cowbell Marathon/Half-Marathon/10K/5KSaint Charles, MOMarathonHalf Marathon42.195K21.0975K +2 more ~3,000 runners
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Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
MO Cowbell Marathon: common questions
- When is the MO Cowbell Marathon?
- The next confirmed date is Sunday, November 8, 2026.
- Where is the MO Cowbell Marathon held?
- In St. Charles, Missouri.
- What distances does the MO Cowbell Marathon offer?
- Marathon, Half, 10K and 5K.
- How many people run the MO Cowbell Marathon?
- About 3,000 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the MO Cowbell Marathon?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the MO Cowbell Marathon?
- Yes — registration is open.
- What time does the MO Cowbell Marathon start?
- 7:30 AM CST.
- What is the course like at the MO Cowbell Marathon?
- Loop course; Mostly road, some trail; 520 ft gain, 520 ft loss (estimated from third-party elevation data); Boston qualifier.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.