Chelmsford Marathon

Chelmsford, England, UK · October 11, 2026·
cloudy51°·59° high·Breezy·Dry
8
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Race Day Weather

cloudy
51°at start
60° high
Breezy
Dry
Your goal
0:00:00

Cool conditions, wind adjustments needed

Runners will face a temperature range from 49°F to 59°F, with humidity at 71%. Wind will be a factor, starting as a headwind in miles 1-4 and again in miles 7-10, so pacing adjustments will be crucial early on. A tailwind will assist in miles 13-14 and 21-27, providing opportunities for faster splits. Hydration should be prioritized given the humidity, especially in the later miles.

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Pace Calculator

26.2mi
0:00:00
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Race Plan

Get your personalized Chelmsford Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Chelmsford Marathon is a single-lap road race that starts and finishes in Central Park, Chelmsford, Essex, running through the park's tree-lined avenues and out into the surrounding Essex countryside. A half marathon runs an out-and-back course on the same morning, starting half an hour after the marathon's 9:00 AM gun. The race has run each October since at least 2016 and raises funds for Little Havens Children's Hospice.

Race weekend

Sunday, October 11
9:00 AMMarathon (26.2 mi)
9:30 AMHalf Marathon (13.1 mi)

FAQ

When is the 2026 Chelmsford Marathon?

The 2026 Chelmsford Marathon will be held on Sunday October 11, 2026.

Is the Chelmsford Marathon a Boston Marathon Qualifier?

Yes, the Chelmsford Marathon is an official Boston Marathon qualifier.

What is the time limit for the Chelmsford Marathon?

The time limit for the Chelmsford Marathon is 6 hours.

What will the weather be like for the 2026 Chelmsford Marathon?

The forecast calls for a high of 60°F and a low of 47°F with a 10% chance of rain.

Historical Weather

Based on 11 years of data
Avg Temp
55°F
L:52° H:58°
RunScore
8
Conditions
Rain Freq
55%
6 of 11 yrs
Wind10mph
Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
cloudy
50°/56°-
9
2024
clear-day
44°/50°-
10
2023
clear-day
41°/48°-
10
2022
clear-day
52°/60°-
8
2021
partly-cloudy-day
53°/58°Light
8
2019
partly-cloudy-day
57°/62°Light
6
2018
cloudy
57°/58°Light
7
2017
clear-day
57°/64°Light
6
2016
cloudy
54°/61°Light
7
2015
partly-cloudy-day
50°/55°-
9
2014
partly-cloudy-day
61°/64°Light
6