Utrecht Science Park Marathon

The Utrecht Marathon (Utrecht Science Park Marathon) is an annual marathon competition which takes place in Utrecht, the Netherlands, in March. First held in 1978 as the U N Marathon, the event featured a full marathon competition 21.0975 kilometres (13.1094 mi) and also a half marathon race. It attracted a largely domestic field of runners in its first decade and began to attract other European runners in the 1990s. 

The marathon race was removed from the programme of events between 1999 and 2004, and the city of Utrecht hosted just the half marathon during this period. Another organisation had created the Leidsche Rijn Marathon in 2000, whose course ran through the local area from Vleuten to De Meern. The race organiser groups combined their efforts in 2005, forming the Utrecht Marathon, and the city of Utrecht once again hosted annual marathon and half marathon races.