MO Cowbell Marathon

Runners will face a temperature increase from 44°F at the start to 61°F by the finish. Wind will be light at 7 mph, with a mix of headwind, tailwind, and crosswind throughout the course. With average humidity at 58%, it’s advisable to pace conservatively in the early laps and stay hydrated as temperatures rise. No significant rain is expected, allowing for a smooth race experience.

Race day forecast available in 27 days

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Distance: 26.2mi

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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

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Race weekend

Sunday, November 8

7:30 AMMarathon (26.2 mi)

Half Marathon (13.1 mi)

10K (6.2 mi)

5K (3.1 mi)

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

65°F

L:59° H:71°

RunScore

Conditions

Rain Freq

17%

2 of 12 yrs

Wind8mph

Dew53°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 MO Cowbell Marathon Clear conditions throughout the day. 2025	63°/80°	-	54°
2024 MO Cowbell Marathon Clear conditions throughout the day. 2024	67°/79°	-	52°
2023 MO Cowbell Marathon Clear conditions throughout the day. 2023	64°/82°	-	60°
2022 MO Cowbell Marathon Clear conditions throughout the day. 2022	52°/70°	-	48°
2021 MO Cowbell Marathon Partly cloudy throughout the day with rain. 2021	71°/75°	Light	67°
2019 MO Cowbell Marathon Partly cloudy throughout the day. 2019	61°/65°	-	48°
2018 MO Cowbell Marathon Partly cloudy throughout the day with rain. 2018	67°/82°	-	70°
2017 MO Cowbell Marathon Partly cloudy throughout the day. 2017	56°/70°	-	46°
2016 MO Cowbell Marathon Cloudy skies throughout the day. 2016	61°/70°	-	59°
2015 MO Cowbell Marathon Partly cloudy throughout the day. 2015	51°/56°	-	47°
2014 MO Cowbell Marathon Partly cloudy throughout the day. 2014	48°/64°	-	40°
2013 MO Cowbell Marathon Partly cloudy throughout the day. 2013	50°/54°	Light	41°