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MO' Cowbell Marathon

November 8, 2026 · 7:30 AMSt. Charles, Missouri, United States

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Race snapshot

Race Day

45°F

39–63°F · Feels cool

Total elevation gain

394ft

Relatively flat course · Net elevation change +0 ft

Crowd Rating

5/ 10

Good crowd energy

The Lowdown

The MO' Cowbell Marathon is a USATF-certified marathon in historic St. Charles, Missouri, run on the Sunday in early November along the Missouri River. The course is flat for nearly ten miles before a two-mile hilly stretch, and the last mile runs downhill to the finish at Frontier Park. The event also offers a half marathon, a 10K and a 5K. Marathon entries are sold out as of October 2026 and a waiting list is open.

Previous edition results — 2025

Minimum Age: 14 years
Entry Methods: Online registration through RunSignUp.
Eligibility: Participants must be at least 14 years old for the marathon and half marathon; exceptions may be granted case by case.
Cancellation & Refund Policy: All entry fees are non-refundable, including after a weather-related cancellation.
Runners may transfer between race distances; downgrades are not refunded and upgrades pay the fee difference.

Prepare for This Race

Pace CalculatorPlan splits for marathon Race PredictorPredict your marathon time BQ CalculatorBQ-eligible course Fuel PlannerPlan nutrition for marathon, cool weather Difficulty Analyzer394ft gain, 45°F avg, marathon Training PacesTraining zones for marathon

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