The 2026 Rennes Marathon has concluded.Share your finish2026 Results

Rennes Marathon

Race complete
Rennes, France · October 18, 2026
cloudy47°·56° high·Breezy·Dry
9
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Race Day Weather

cloudy
47°at start
57° high
Breezy
Dry
Your goal
0:00:00

Cool temps, light rain expected

Runners will face temperatures starting at 46°F and rising to 57°F by the finish, with a light rain expected throughout. Wind will be a factor, with a headwind during miles 7-11 and 18-22, requiring pacing adjustments in those stretches. With humidity at 82%, staying hydrated is crucial, and a light throwaway layer may be helpful during the pre-race wait.

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Pace Calculator

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Race Plan

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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 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)
9:15 PMMile Battle (1.0 mi)
9:30 PM10K (6.2 mi)

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 57°F and a low of 45°F with a 100% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 6 years of data
Avg Temp
54°F
L:48° H:60°
RunScore
8
Conditions
Rain Freq
33%
2 of 6 yrs
Wind7mph
Dew49°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
47°/56°Light
9
2025
cloudy
46°/52°Light
9
2024
partly-cloudy-day
47°/61°-
8
2023
clear-day
48°/61°-
8
2022
partly-cloudy-day
59°/70°-
5
2021
cloudy
42°/57°-
9