Jisho

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Noun
1. ultramarathon
Wikipedia definition
2. UltramarathonAn ultramarathon (also called ultra distance) is any sporting event involving running longer than the traditional marathon length of 42.195 kilometres (26.2188 mi). There are two types of ultramarathon events: those that cover a specified distance, and events that take place during specified time (with the winner covering the most distance in that time).
Read “Ultramarathon” on English Wikipedia
Read “ウルトラマラソン” on Japanese Wikipedia
Read “Ultramarathon” on DBpedia

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