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Leiden Marathon

May 9, 2027 · 8:30 AMLeiden, South Holland, Netherlands

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Race Day

59°F

Feels mild

Total elevation gain

49ft

Relatively flat course · Net elevation change +0 ft

Participants

14K

Large field

Crowd Rating

7/ 10

Excellent spectator turnout

Entry

Opening Soon

Marathon (42.195K)

€69

Full marathon entry. Start 8:30 on Koninginnelaan, finish at Vismarkt, 6-hour time limit. Title sponsor SWIS.

Official Website

Key Dates

1. 2026 race day (prior edition)
  May 10, 2026
  35th Leiden Marathon; Lemi Gerema (2:12:46) and Tigist Worku (2:35:14) won the marathon.
2. Online registration opens
  Oct 1, 2026
  Registration for the 2027 edition opens Thursday, October 1, 2026 at 12:00 noon.
3. 5K Night Run
  May 8, 2027
  Floodlit 5K the evening before the main race day, starting at Johnson & Johnson Park (Garenmarkt).
4. Race Day
  May 9, 2027
  Marathon, half marathon, 10K, and Kids Run, all starting on Koninginnelaan and finishing at Vismarkt.

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The Lowdown

The Leiden Marathon returns for its 36th edition on Sunday, May 9, 2027, as the main event of a weekend that opens the evening before with a floodlit 5K night run. Established in 1991, the race is organized by marathon.nl and draws more than 14,000 runners across all distances each year, with roughly 1,000 tackling the full marathon. The single-loop, AIMS-certified course starts on Koninginnelaan and finishes at the historic Vismarkt, tracing Leiden's canal-lined city center before heading out through flat surrounding polders and green villages and looping back through crowd-lined streets to the finish arch. Distance sponsors include SWIS (marathon), Bunnig & Partners (half marathon), Zorg en Zekerheid (10K), PF Concept (5K night run), and Corpus (2.1K Kids Run). The flat, fast layout has made Leiden a recognized Boston Marathon qualifying course. Registration for the 2027 race opens October 1, 2026 at noon; prices are set at €69 for the marathon, €42 for the half marathon, €29 for the 10K, and €16 for the 5K night run, with the Kids Run free.

Minimum Age: 18 years
Entry Methods: Online registration via marathon.nl (opens October 1, 2026)
Eligibility: Minimum age 18 for the full marathon
Minimum age 16 for the half marathon
Minimum age 12 for the 10K
No minimum age for the Kids Run
Required Documents: Government-issued photo ID for bib pickup
Cancellation & Refund Policy: Review the official cancellation and deferral policy on marathon.nl before registering

Prepare for This Race

Pace CalculatorPlan splits for marathon Race PredictorPredict your marathon time BQ CalculatorBQ-eligible course Fuel PlannerPlan nutrition for marathon, moderate weather Difficulty Analyzer49ft gain, 59°F avg, marathon Training PacesTraining zones for marathon

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