Illsee is a natural lake used as a reservoir above Sierre, in the Valais, Switzerland. Its surface area is 0.21 km2 (0.081 sq mi).

Illsee
Illsee is located in Canton of Valais
Illsee
Illsee
Illsee is located in Switzerland
Illsee
Illsee
Illsee is located in Alps
Illsee
Illsee
LocationSierre, Valais
Coordinates46°15′27″N 7°37′57″E / 46.25750°N 7.63250°E / 46.25750; 7.63250
Typenatural lake, reservoir
Primary outflowsIllbach
Catchment area5.9 km2 (2.3 sq mi)
Basin countriesSwitzerland
Max. length0.2 km (0.12 mi)
Surface area0.21 km2 (0.081 sq mi)
Max. depth64 m (210 ft)
Water volume6.6 million cubic metres (5,400 acre⋅ft)
Surface elevation2,360 m (7,740 ft)
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