The FIS Nordic Ski Marathon Cup is an official skiing marathon cup held since 2005 and governed by the FIS. The cup consists of four locations, held several weeks apart in each of the Nordic countries. The first event is usually held in February in Holmenkollen Skimaraton, Norway, the second in Oulun Tervahiihto, Finland in early March, the third in Tornedalsloppet, Sweden in late March or early April and the Fossavatn Ski Marathon in Iceland in late April or early May.
References
FIS Nordic Ski Marathon Cup Wikipedia(Text) CC BY-SA