Races Marathon · St. Charles, USA
MO' Cowbell Marathon
MO' Cowbell Marathon is a rolling marathon in St. Charles, USA, held each November. The course is flat for about 16 km (10 miles), then climbs on a 3 km (two-mile) stretch along Little Hills Expressway. The last 1.6 km (mile) runs downhill into Frontier Park. Early November mornings in eastern Missouri are cool and usually dry, typically 1 to 14°C. With MO' Cowbell Marathon's constant undulation, pace by effort rather than the watch: even effort beats even splits here.
Page rebuilt 2026-11-14 · race facts not independently verified — confirm dates and entries on the official race site
When
November
every year
Course
rolling
Marathon
Conditions
Early November mornings in eastern Missouri are cool and usually dry, typically 1 to 14°C.
Racing this course well
The course is flat for about 16 km (10 miles), then climbs on a 3 km (two-mile) stretch along Little Hills Expressway. The last 1.6 km (mile) runs downhill into Frontier Park.
With MO' Cowbell Marathon's constant undulation, pace by effort rather than the watch: even effort beats even splits here.
Getting a place
- How you get in
- Open entry: first come, first served
Official MO' Cowbell Marathon site →Checked November 2026
Race day
- Start time
- 07:30
- Time limit
- 6.5 hours
- Also on the day
- half-marathon, 10k, 5k
The course in numbers
The route passes through New Town St. Charles just beyond halfway. The hilly Little Hills Expressway section comes after the flat opening miles.
- Boston qualifier
- Yes
Worth knowing
- The start and finish are in Frontier Park, between historic Main Street and the Missouri River.
Pick your goal for St. Charles
Pace charts, weekly structure and timelines for the most common marathon goals:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around MO' Cowbell Marathon.
RunV works backwards from race day to today. Your plan adapts when life interrupts, and you approve every change. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the MO' Cowbell Marathon?
- It is held each November in St. Charles, USA. Check the official MO' Cowbell Marathon site for the exact date and entry windows.
- Is the MO' Cowbell Marathon course flat?
- The course is flat for about 16 km (10 miles), then climbs on a 3 km (two-mile) stretch along Little Hills Expressway. The last 1.6 km (mile) runs downhill into Frontier Park.
- How do I enter the MO' Cowbell Marathon?
- Open entry: first come, first served.
- Is the MO' Cowbell Marathon a Boston qualifier?
- Yes. The MO' Cowbell Marathon is run on a certified course, so a time set here can be used to apply for the Boston Marathon.
- How should I train for the MO' Cowbell Marathon?
- Train specifically for St. Charles — terrain, conditions, goal pace — and let the plan flex around real life. With RunV Premium you can adapt your plan to fit your week.
Not sure what to target? Predict your marathon time from a recent race →
More marathon races
Supplements research for this distance
Build for St. Charles — around your actual life
RunV engineers your block backwards from race day in November — and adapts it when training doesn't go to script. You approve every change.
