A Swedish classic is a diploma awarded to those who have finished races in four races disciplines (cross country skiing, cycling, swimming and cross country running) during a 12-month period. The diploma was first awarded in 1972.

The Swedish classic consists of five different races:

Vasaloppet (skiing) or Engelbrektsloppet (skiing)
Lidingöloppet (running)
Vansbrosimningen (swimming)
Vätternrundan (biking)

Read more at En Svensk Klassiker’s webpage