Lake Hallwil

Lake Hallwil
Hallwilersee
Lake Hallwil Location within Canton of Lucerne Show map of Canton of Lucerne Lake Hallwil Location within Canton of Aargau Show map of Canton of Aargau Lake Hallwil Location within Switzerland Show map of Switzerland Lake Hallwil Location within Alps Show map of Alps
Location	Aargau
Coordinates	47°17′N 8°12′E / 47.283°N 8.200°E / 47.283; 8.200
Primary inflows	Aabach
Primary outflows	Aabach
Catchment area	128 km2 (49 sq mi)
Basin countries	Switzerland
Max. length	8.4 km (5.2 mi)
Max. width	1.5 km (0.93 mi)
Surface area	10.3 km2 (4.0 sq mi)
Average depth	28 m (92 ft)
Max. depth	48 m (157 ft)
Water volume	0.285 km3 (231,000 acre⋅ft)
Residence time	3.9 years
Surface elevation	449 m (1,473 ft)
Settlements	Beinwil am See, Meisterschwanden, Seengen
Location
Interactive map of Lake Hallwil

Lake Hallwil (German: Hallwilersee) is a lake largely in the Canton of Aargau, Switzerland, located at 47°17′N 8°12′E / 47.283°N 8.200°E / 47.283; 8.200. It is the largest lake in Aargau and lies mostly in the districts of Lenzburg and Kulm on the southern edge of the canton. The southern tip of the lake reaches into the canton of Lucerne. The main river leading to this lake is the Aabach, which is coming from the Lake Baldegg.

Its surface is approximately 10.3 km² and its maximum depth is 48 metres. It is a popular vacation destination.

In 1938 Sir Malcolm Campbell set a world water speed record in Blue Bird K3 on the lake.