Leiden Marathon

Leiden, Netherlands · May 9, 2027·
partly-cloudy-day54°·62° high·Breezy·Dry
7
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Race Day Weather

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54°at start
65° high
Breezy
Dry
Your goal
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Mild start, shifting winds ahead

Runners will face a temperature rise from 54°F at the start to 65°F by the finish, with average humidity around 65%. Wind will be a factor, starting with a headwind in the first two miles before shifting to tailwind between miles 6-14. To optimize performance, runners should start conservatively and hydrate frequently, especially as temperatures increase.

Race day forecast available in 192 days
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Pace Calculator

26.2mi
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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 Leiden Marathon, established in 1991, starts and finishes at Vismarkt and takes runners through a stunning mix of historic city landscapes and sprawling countryside. The course is flat with an elevation gain of around 15 meters and features iconic landmarks like Pieterskerk, alongside traditional windmills and narrow, atmospheric streets. It's a beautifully organized race that gives you a feel for both urban and rural Netherlands.

Race weekend

Saturday, May 8
10:30 PM5K (3.1 mi)
Sunday, May 9
8:30 AMMarathon (26.2 mi)
10:00 AMHalf Marathon (13.1 mi)1:00 PM10K (6.2 mi)

FAQ

When is the 2027 Leiden Marathon?

The 2027 Leiden Marathon will be held on Sunday May 9, 2027.

Is the Leiden Marathon a Boston Marathon Qualifier?

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

What will the weather be like for the 2027 Leiden Marathon?

The forecast calls for a high of 63°F and a low of 47°F with a 10% chance of rain.

Historical Weather

Based on 5 years of data
Avg Temp
61°F
L:56° H:66°
RunScore
7
Conditions
Rain Freq
20%
1 of 5 yrs
Wind10mph
Dew49°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2026
cloudy
52°/57°-
8
2025
clear-day
57°/70°-
7
2024
rain
60°/71°Light
5
2023
cloudy
53°/61°-
7
2022
clear-day
57°/71°-
6