2027 NN Marathon Rotterdam - Apr 11 Countdown

Q: How do I register for the 2027 Rotterdam Marathon?

Entry is by lottery (ballot), not first-come. You pre-register on the official site at nnmarathonrotterdam.nl, and bib numbers are then randomly distributed among pre-registrants so every interested runner has an equal chance. The full marathon carries an entry cap of about 18,000 places. The current entry price is &euro;155 (with a small discount for early pre-registration).

Q: What is the course like and where does it start and finish?

It is a single large city loop. The marathon starts at the foot of the Erasmus Bridge (on the Schiedamsedijk) and finishes on the Coolsingel in the heart of Rotterdam, a short distance from the start. The route runs on wide paved roads through the city's modern post-war architecture and along the River Maas, finishing on a long, grandstand-lined home straight famous for fast closing splits.

Q: Is the Rotterdam Marathon a Boston qualifier?

Yes. The course is World Athletics Elite/Gold Label certified, so a time run here is BQ-eligible for the Boston Marathon. No qualifying time is required to enter Rotterdam itself; you only need a BQ-standard finish if you intend to use the result to apply for Boston.

Q: What is the time limit?

The official cutoff is 5 hours 30 minutes, timed from when you cross the start line (chip/net time). Runners who finish after the deadline are not included in the official results. The course closes progressively behind the last-runner referee, so plan a pace that keeps you ahead of sweep vehicles on the river sections.

Q: What is the weather usually like on race day?

Mid-April in Rotterdam is cool maritime spring: about 11&deg;C (51&deg;F) on average with roughly 75% humidity and a noticeable 20-25 km/h breeze off the North Sea. Rain crosses on about 1 day in 3, so conditions are usually good for fast running but can turn blustery and wet. The exposed bridges are where wind hits hardest.

Q: How do I get to Rotterdam and where do I fly into?

The nearest hub is Amsterdam Schiphol (AMS), about 25-30 minutes by direct intercity train to Rotterdam Centraal, which sits a short walk from the start. Rotterdam The Hague Airport (RTM) handles some regional flights. The compact city centre means most hotels are within walking distance of the Coolsingel finish and the Erasmus Bridge start, with no race-morning transfer needed.

Q: When do results come out and is the race chip-timed?

The race uses chip (net) timing, and live splits plus finish results are published the same day on the official site and tracking app. Because entry is a ballot, securing a confirmed bib well in advance lets you lock travel; the flat profile means your net time is a clean, BQ-usable benchmark with minimal terrain noise.

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Race Information

Race	2027 NN Marathon Rotterdam - Apr 11
City	Rotterdam
Date	2027-04-11 at 10:00
Field Size	~18,000 runners
Time Limit	5 hours 30 min
Cutoff pace	7:49/km
Course speed	Fast course Speed index 0.91 — median of the last 4 winners' times against the global same-year median. Winner times track elite fields and prize money, so this reads the course as a proxy, not a pure measurement.
Timezone	Europe/Amsterdam
Official Site	Stichting Rotterdam Marathon (Rotterdam Marathon B.V.)

Race Day Weather

Average Temperature	8.7°C / 48°F
Humidity	83%
Wind	24 km/h
Rain Chance	30%
Typical Conditions	Cool, mild North Sea spring with breezy, changeable skies. Race-morning averages hover around 9°C (48°F) with ~75% humidity and a steady 20-25 km/h wind off the Maas. Showers cross on roughly 1 day in 3.

What to Prepare: Dress for 11°C in motion: singlet or short sleeves, arm warmers you can ditch, and a throwaway layer for the corral. Wind on the exposed bridge sections is the real variable, so tuck into packs and save energy on the open stretches along the river.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 24 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Race-Week Climate

Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis

	Cooler	Typical	Warmer
Temperature	5.4°C	8.7°C	11.8°C
Dew point	1.6°C	5.8°C	9.2°C

Wet-day chance: 30% Runnability: 70/100

Recent actuals: 2024 10.9°C / 2025 13.5°C / 2026 8.2°C (morning avg)

Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center

Course Profile

Course Type	Single large city loop that starts at the foot of the Erasmus Bridge (Schiedamsedijk) and finishes on the Coolsingel in the heart of Rotterdam
Elevation Gain	5m
Terrain	100% paved asphalt on broad urban roads. World Athletics Elite/Gold Label certified, with long straight sections built for rhythm and a fast, crowd-lined Coolsingel finish.
Profile	One of the flattest big-city marathons in the world. The only real climbs are the Erasmus Bridge, crossed twice (around 3 km and again near 27 km), plus two short wooden-bridge sections (around 5 km and 30 km); everything in between is dead level through Rotterdam's wide modern boulevards.
Boston Qualifier	Yes — Check your BQ time

Prepare for 2027 NN Marathon Rotterdam - Apr 11

Use our free training tools to get race-ready:

Running Pace Calculator — Min/km, Finish Time & Pace Chart

Free running pace calculator for 5K, 10K, half marathon, and marathon. Get min/km or min/mile, your ...

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Free Pace Band Generator — Printable Race Day Wristband

Free printable pace band for marathon, half marathon, or custom distance. Choose even, negative, or ...

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Marathon Wake-Up Time Calculator — Race Morning Timeline

7 AM race, wake at 3:45 AM? Enter the gun time; we work backward through meal, gear, bathroom, warm-...

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Dew Point Running Calculator — Pace Adjustment Chart

Enter temperature and humidity to calculate dew point and its impact on your running pace. 7-zone ch...

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Wind Effect on Running — How Much Does Wind Slow You?

How much does a headwind actually slow you down? This free calculator turns wind speed and direction...

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Marathon Predictor — 5K, 10K & Half Marathon Race Predictor

Free marathon predictor — convert your 5K, 10K, or half marathon time into race-day estimates from R...

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Frequently Asked Questions

How do I register for the 2027 Rotterdam Marathon?

Entry is by lottery (ballot), not first-come. You pre-register on the official site at nnmarathonrotterdam.nl, and bib numbers are then randomly distributed among pre-registrants so every interested runner has an equal chance. The full marathon carries an entry cap of about 18,000 places. The current entry price is €155 (with a small discount for early pre-registration).

How flat is the Rotterdam Marathon course?

It is one of the flattest big-city marathons in the world. The only climbs are the Erasmus Bridge, which the route crosses twice (around 3 km and again near 27 km), plus two short wooden-bridge sections at roughly 5 km and 30 km. Combined with long straight boulevards, that is why Rotterdam is routinely called one of Europe's fastest courses and a magnet for personal-best attempts.

What is the course like and where does it start and finish?

It is a single large city loop. The marathon starts at the foot of the Erasmus Bridge (on the Schiedamsedijk) and finishes on the Coolsingel in the heart of Rotterdam, a short distance from the start. The route runs on wide paved roads through the city's modern post-war architecture and along the River Maas, finishing on a long, grandstand-lined home straight famous for fast closing splits.

Is the Rotterdam Marathon a Boston qualifier?

Yes. The course is World Athletics Elite/Gold Label certified, so a time run here is BQ-eligible for the Boston Marathon. No qualifying time is required to enter Rotterdam itself; you only need a BQ-standard finish if you intend to use the result to apply for Boston.

What is the time limit?

The official cutoff is 5 hours 30 minutes, timed from when you cross the start line (chip/net time). Runners who finish after the deadline are not included in the official results. The course closes progressively behind the last-runner referee, so plan a pace that keeps you ahead of sweep vehicles on the river sections.

What is the weather usually like on race day?

Mid-April in Rotterdam is cool maritime spring: about 11°C (51°F) on average with roughly 75% humidity and a noticeable 20-25 km/h breeze off the North Sea. Rain crosses on about 1 day in 3, so conditions are usually good for fast running but can turn blustery and wet. The exposed bridges are where wind hits hardest.

How do I get to Rotterdam and where do I fly into?

The nearest hub is Amsterdam Schiphol (AMS), about 25-30 minutes by direct intercity train to Rotterdam Centraal, which sits a short walk from the start. Rotterdam The Hague Airport (RTM) handles some regional flights. The compact city centre means most hotels are within walking distance of the Coolsingel finish and the Erasmus Bridge start, with no race-morning transfer needed.

When do results come out and is the race chip-timed?

The race uses chip (net) timing, and live splits plus finish results are published the same day on the official site and tracking app. Because entry is a ballot, securing a confirmed bib well in advance lets you lock travel; the flat profile means your net time is a clean, BQ-usable benchmark with minimal terrain noise.