Leiden 10K

Starting at 63°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 198 days

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Distance: 6.2mi

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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.

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Race Info

The Leiden 10K runs on the Sunday afternoon of race weekend, starting on the Koninginnelaan and finishing at the Vismarkt. The route stays within the city and includes a loop through the Roomburg district and park Matilo. Spectators line much of the course.

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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)

Course Map

FAQ

When is the 2027 Leiden 10K?

The 2027 Leiden 10K will be held on Sunday May 9, 2027.

What is the time limit for the Leiden 10K?

The time limit for the Leiden 10K is 1.5 hours.

What will the weather be like for the 2027 Leiden 10K?

The forecast calls for a high of 62°F and a low of 46°F with a 10% chance of rain. Check our detailed hourly forecast above for the best 10K race plan.

Historical Weather

Based on 5 years of data

Avg Temp

69°F

L:68° H:70°

RunScore

Conditions

Rain Freq

0 of 5 yrs

Wind12mph

Dew48°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Leiden 10K Partly cloudy throughout the day. 2026	59°/60°	-	44°
2025 Leiden 10K Clear conditions throughout the day. 2025	72°/74°	-	43°
2024 Leiden 10K Clear conditions throughout the day with morning rain. 2024	74°/75°	-	54°
2023 Leiden 10K Clearing in the afternoon. 2023	62°/64°	-	53°
2022 Leiden 10K Partly cloudy throughout the day. 2022	73°/74°	-	48°

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