Korketrekkeren (direct translation: "The Corkscrew") is a tobogganing track and former bobsleigh and luge track in Oslo, Norway. The tobogganing track runs between Frognerseteren and Midtstuen and is operated as a public venue by the municipality. Return transport to the top of the hill is undertaken by riding the Oslo Metro's Holmenkollen Line. Tobogganing in the area started in the 1880s, with several roads being used during winter evenings. Auto racing took place in the hill in 1921 and the following year it saw its first luge tournament.