Oslo arranged the World Championships in 1930, 1966, 1982 and 2011. In all the World Championships held in Oslo, the Holmenkollen 50 km was arranged as a part of the World Championships. In 1952, a separate 50 km race was held two weeks after the 1952 Winter Olympics in Oslo. The individual races in the 1982 World Championships were a part of the 1981–82 Cross-Country World Cup, the first official World Cup season, and the Holmenkollen 50 km race has since been a part of the World Cup, with the exception in 1985 when the 50 km did not have World Cup status. The cross-country skiing events at the 2011 World Championships were not part of the World Cup, unlike the 1982 World Championships.