Lake Brienz (German: Brienzersee) is a lake just north of the Alps, in the canton of Bern in Switzerland. It has a length of about 14 kilometres (8.7 mi), a width of 2.8 kilometres (1.7 mi) and a maximum depth of 260 metres (850 ft). Its area is 29.8 square kilometres (11.5 sq mi) the surface is 564 metres (1,850 ft) above the sea-level. It is fed, among others, by the upper reaches of the Aare at its eastern end.