thumb|272x272px|Store Tryvannet and Tryvannstua Tryvann is a small lake in Nordmarka, the forest area just north of Oslo city, near the Holmenkollen ski jump. By the water lies a cabin called Tryvannstua, in which there is a café open regularly during both summer and winter. On a hill above the lake looms the television tower Tryvannstårnet ("The Tryvann tower"), visible from most of Oslo. Tryvann is the entry and beginning of Nordmarka. It is used all year around. The key purposes of this area in the winter are skiing and cross-country skiing, whereas in the summer it is more commonly used fo
thumb|272x272px|Store Tryvannet and Tryvannstua Tryvann is a small lake in Nordmarka, the forest area just north of Oslo city, near the Holmenkollen ski jump. By the water lies a cabin called Tryvannstua, in which there is a café open regularly during both summer and winter. On a hill above the lake looms the television tower Tryvannstårnet ("The Tryvann tower"), visible from most of Oslo. Tryvann is the entry and beginning of Nordmarka. It is used all year around. The key purposes of this area in the winter are skiing and cross-country skiing, whereas in the summer it is more commonly used for walks in the forest and biking. When referring to Tryvann, it is mostly referred to as the Tryvann vinterpark.
==Facts and infrastructure== Tryvann vinterpark is an alpine ski resort in the area around Tryvann. The first ski slope of Tryvann vinterpark, named "Tryvannskleiva", was created in 1931. Since then an enormous expansion has occurred, and today Tryvann vinterpark consists of 18 slopes and 11 lifts. The longest run (Wyllerløypa) is 1,400 metres, with a drop of 381 metres. All the slopes have floodlighting which covers over 9.6 km of terrain. The resort has a fairly large terrain park featuring edge rails, boxes, jib features and a full-scale halfpipe, regularly hosting some minor national skiing and snowboarding competitions.
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