Rennes Marathon

Rennes, France · October 18, 2026
partly-cloudy-day54°·62° high·Breezy·Dry
7
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Race Day Weather

partly-cloudy-day
54°at start
64° high
Breezy
Dry
Your goal
0:00:00

Cool start, warming up later

Runners will face a temperature rising from 47°F at the start to 62°F by the finish. Winds will be moderate at 14 mph from the SE, with gusts up to 36 mph. With humidity at 69%, it's advisable for runners to adjust their pace as conditions warm. Light layers may be beneficial during the pre-race wait.

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Race Info

The Rennes Marathon is a 42.195-kilometer race through downtown Rennes in Brittany, France, starting at Mail François Mitterrand and finishing at Esplanade Charles de Gaulle. The two-loop, mostly flat course passes the Vilaine riverbanks, the Parliament of Brittany and Rennes City Hall, and carries FFA gold label certification. Race weekend also includes a Saturday-night 10K and a women's 5K, with a marathon finisher cutoff of 5 hours 30 minutes. First run in 2011, the race funds tree planting based on the distance each participant covers.

Race weekend

Saturday, October 17
8:00 PMWomen's 5K (3.1 mi)
9:30 PM10K (6.2 mi)
Area Map

Course Map

FAQ

When is the 2026 Rennes Marathon?

The 2026 Rennes Marathon will be held on Sunday October 18, 2026.

Is the Rennes Marathon a Boston Marathon Qualifier?

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

What is the time limit for the Rennes Marathon?

The time limit for the Rennes Marathon is 5.5 hours.

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

The forecast calls for a high of 64°F and a low of 51°F with a 29% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 4 years of data
Avg Temp
55°F
L:50° H:61°
RunScore
8
Conditions
Rain Freq
25%
1 of 4 yrs
Wind7mph
Dew51°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
cloudy
46°/52°Light
10
2024
partly-cloudy-day
47°/61°-
8
2023
clear-day
48°/61°-
8
2022
partly-cloudy-day
59°/70°-
6