Hjälmaren
Lake in Sweden
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Hjälmaren, also spelled Jälmaren, is Sweden's fourth largest lake. It is situated in the Central Swedish lowland and drains through Eskilstunaån into the adjacent Lake Mälaren, which in turn drains into the Baltic Sea, west of Stockholm. Wikipedia
Fish: Common carp, Zander, Rainbow trout, and more
Max. depth: 20 m (66 ft)
Area: 179.2 mi²
Surface elevation: 72′
Outflow location: Eskilstunaån