|Primary inflows||Lauibach, Eibach|
|Primary outflows||Sarner Aa|
|Max. length||2 km (1.2 mi)|
|Max. width||200–800 m (660–2,620 ft)|
|Surface area||2.01 km2 (0.78 sq mi)|
|Max. depth||68 m (223 ft)|
|Surface elevation||688 m (2,257 ft)|
Lake Lungern (German: Lungerersee, also spelled Lungernsee or Lungerensee) is a natural lake in Obwalden, Switzerland which is named after the town Lungern on its shore. The lake is drained by the Sarner Aa river, which flows through the Sarnersee and into Lake Lucerne.
The lake was originally much larger, and covered a large part of the valley it is situated in. Starting in 1836, its level was lowered by 36 metres through an artificial drainage tunnel of 380 m length. It is used as a reservoir.
- map.geo.admin.ch (Map). Swiss Confederation. Retrieved 2013-01-05.
- Brockhaus' Konversations-Lexikon. 14th ed., Leipzig, Berlin and Vienna 1894; Vol. 11, p. 385
- Edy von Wyl: Lungernsee in German, French and Italian in the online Historical Dictionary of Switzerland.
- Media related to Lungerersee at Wikimedia Commons
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