Göteborgsvarvet (Swedish: [jœtɛˈbɔ̂rjsˌvarːvɛt]) is an annual half marathon running competition in Gothenburg, Sweden (often called the Gothenburg Half Marathon in English). . It is the largest annual running competition in the world in terms of entries, with its 62,000 entries for the Göteborgsvarvet competition on 18 May 2013. In 2016, 64,500 people entered the race. The youngest runner was 17 years old and the oldest female runner 83 and male runner 87.
https://en.wikipedia.org/wiki/G%C3%B6teborgsvarvet