Tunnsjøen

64°42′18″N 13°12′42″E / 64.7050°N 13.2116°E / 64.7050; 13.2116Typeglacier lakePrimary inflowsIngelsvasselva, Mykkelvikelva, Rørvasselva and StallvikelvaPrimary outflowsTunnsjøelvaCatchment area388.68 km² (150.07 sq mi)Basin countriesNorwayMax. length20 km (12 mi)Max. width10 km (6.2 mi)Surface area100.18 km² (38.68 sq mi)Average depth88 m (289 ft)Max. depth222 m (728 ft)Water volume8.816 km³ (2.115 cu mi)Shore length¹118 km (73 mi)Surface elevation358 m (1,175 ft)IslandsGudfjelløya and Litlfjelløya (or Reinøya)ReferencesNVE¹ Shore length is not a well-defined measure.

Tunnsjøen (Norwegian) or Dåtnejaevrie (Southern Sami) is a lake in the municipalities of Røyrvik and Lierne in Trøndelag county, Norway. The 100.18-square-kilometre (38.68 sq mi) lake lies just south of the large lake Limingen, and just west of the border with Sweden. It is 358 m (1,175 ft) above sea level and has a volume of 8.816 km³ (2.115 cu mi). The deepest part of the lake is 222 m (728 ft) deep. It is the seventh largest lake in Norway.^[1]

Gudfjelløya

The island Gudfjelløya (Southern Sami: Tjåehkere) lies in Tunnsjøen lake. Its highest point is 812 m (2,664 ft) above sea level; which is 454 m (1,490 ft) higher than the lake. The peak is named: Gudfjellet (in english "God's Mountain"). This makes Gudfjelløya the highest island within a lake in Norway; and in Europe. Its towering higher than the island of Monte Isola within Lake Iseo, in northern Italy. The island is located in the lake's central parts. The area is about 6.1 km² (2.4 sq mi). To the southwest of it, the lake's second largest island is situated. That is: Litlfjelløya (in english: "Little Mountain Island"); also called Reinøya (in english: "Reindeer Island"). Its highest point is 177 m (581 ft) above the lake's water surface.

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