The Tryvann Ski Resort (Norwegian: Tryvann Vinterpark) is a ski resort in Oslo, Norway. It is the most used ski resort of Norway.[1] In the 1930s, the ski slope Tryvannskleiva was constructed, and the first race was held in 1933.[2] The ski slope was later expanded with Tommkleiva, Wyllerløypa and finally with Tryvann Ski Resort.[2] As of winter of 2010, the resort has 14 slopes and 7 lifts.[1]