MO Cowbell Marathon

St. Charles, MO, USA · November 08, 2026
partly-cloudy-day44°·60° high·Light·Dry
9
Register

Race Day Weather

partly-cloudy-day
44°at start
61° high
Light
Dry

Cool conditions, steady pacing advised

Runners will face temperatures starting at 44°F and rising to 61°F by the finish. With a light wind from the SSW at 7 mph and moderate humidity at 58%, conditions are favorable for a solid race. It's advisable to start conservatively and adjust pacing as temperatures climb, particularly on later laps. Hydration should be prioritized to maintain performance throughout the event.

Race day forecast available in 5 days
partly-cloudy-night8
partly-cloudy-night8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
Pace
—
Weather Adj.
—
Common Goals:

Get forecast alerts for MO Cowbell Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Plan

Get your personalized MO Cowbell Marathon race plan

Weather-adjusted pacing, per-mile terrain splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.

Race Conditions
Terrain Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

MO' Cowbell Marathon has run through St. Charles, Missouri since 2011, started by local organizers to host a family-friendly race for the community. The USATF-certified course starts and finishes along the Missouri River in Frontier Park, staying flat for about ten miles before a two-mile hilly stretch on the Little Hills Expressway and a downhill final mile to the finish. It qualifies for the Boston, New York City, London and Chicago marathons. Source

FAQ

When is the 2026 MO Cowbell Marathon?

The 2026 MO Cowbell Marathon will be held on Sunday November 8, 2026.

Is the MO Cowbell Marathon a Boston Marathon Qualifier?

Yes, the MO Cowbell Marathon is an official Boston Marathon qualifier.

What is the time limit for the MO Cowbell Marathon?

The time limit for the MO Cowbell Marathon is 6.5 hours.

What will the weather be like for the 2026 MO Cowbell Marathon?

The forecast calls for a high of 60°F and a low of 41°F with a 6% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 12 years of data
Avg Temp
74°F
L:62° H:74°
RunScore
7
Conditions
Rain Freq
33%
4 of 12 yrs
Wind11mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
68°/85°-
7
2024
clear-day
72°/82°-
7
2023
clear-day
70°/85°-
7
2022
clear-day
56°/77°-
8
2021
partly-cloudy-day
72°/77°Light
7
2019
partly-cloudy-day
62°/66°Light
9
2018
cloudy
69°/86°Light
6
2017
partly-cloudy-day
58°/77°-
8
2016
cloudy
62°/71°-
9
2015
cloudy
52°/58°-
8
2014
partly-cloudy-day
51°/73°-
8
2013
partly-cloudy-day
53°/57°Light
7