The Rotterdam Marathon, currently branded NN Rotterdam Marathon, is an annual marathon that has been held in Rotterdam, the Netherlands since 1981. It has been held in April every year since the third edition in 1984, and attracts many top athletes. It has also been ranked as one of the top 10 marathons in the world by Runner's World magazine. The event is the most popular marathon in the Netherlands, followed by the marathons of Amsterdam and Eindhoven.
The 2007 event was stopped after the three and a half hours because of extreme weather conditions; the KNMI meteorological institute described conditions as "unseasonal" and race day was the warmest ever recorded in the city for the month of April, with temperatures reaching a high of 34 °C. Runners were on the course when the race was stopped after that point and some continued despite the warnings and race stoppage.
In 2012, the IAAF Gold Label was awarded to the event, after satisfying the last condition in April that year: the requirement that the race could be followed live on television in at least five countries.