Vasaloppet is an annual long distance cross-country ski race held on the first Sunday of March. The 90 km (56 mi) course starts in the village of Berga, just south of Sälen in western Dalarna, Sweden, and ends in the town of Mora in the central part of the province. It is the oldest cross-country ski race in the world, as well as the one with the highest number of participants.

Gustav I, commonly known as Gustav Vasa, was King of Sweden from 1523 until his death in 1560, previously self-recognised Protector of the Realm (Riksföreståndare) from 1521, during the ongoing Swedish War of Liberation against King Christian II of Denmark, Norway and Sweden. Gustav rose to lead the Swedish War of Liberation following the Stockholm Bloodbath, where his father was executed. Gustav's election as king on 6 June 1523 and his triumphant entry into Stockholm eleven days later marked Sweden's final secession from the Kalmar Union.