MO Cowbell Marathon

St. Charles, MO, USA · November 08, 2026
partly-cloudy-day44°·60° high·Light·Dry
8
Register

Race Day Weather

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

Cool conditions, strategic wind shifts

Runners will face a temperature rise from 44°F to 61°F, with a maximum wind of 7 mph from the south, creating a tailwind in the early miles. Humidity is moderate at 59%, providing a comfortable environment. Strategy should focus on pacing adjustments during the headwind sections from miles 9-16 and 18-19, while taking advantage of the tailwind from miles 20-22 and 24-26 for a strong finish.

Race day forecast available in 156 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

Join thousands from across the Midwest and beyond for the fastest, flattest course you’ve likely ever competed. MO’ Cowbell was started in 2011 with the goal of hosting a family-friendly, fun race put on by local folks for local folks. This flat course that starts and ends along the Missouri River can be used as a qualifier for other esteemed marathons such as the Boston Marathon, New York City Marathon, London Marathon and Chicago Marathon. 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 8% 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
Wind10mph
Dew53°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-day
66°/85°-
7
2024
clear-day
71°/81°-
7
2023
clear-day
69°/85°-
7
2022
clear-day
54°/76°-
8
2021
partly-cloudy-day
72°/77°Light
7
2019
cloudy
63°/65°Light
8
2018
cloudy
70°/86°Light
7
2017
partly-cloudy-day
58°/76°-
8
2016
cloudy
62°/71°-
8
2015
cloudy
51°/57°-
9
2014
partly-cloudy-day
51°/73°-
8
2013
rain
52°/57°Light
7