Lake Sapanca (Turkish: Sapanca Gölü) (previous Greek name: Boáne (Βοάνη)) is a fresh water lake in Turkey, between the Gulf of İzmit and the Adapazarı Meadow.

The lake has a catchment area of 251 km2, surface area of 45 km2, a length 16 km east–west / 5 km north–south, and a maximum depth of 52 m.[1] Sapanca Lake is located on a tectonic hole, which is situated between Izmit Bay and Adapazari Meadow and runs parallel to Iznik Lake.

The catchment area of Lake Sapanca - about 251 km2 [km²] - is surrounded by mountains in the south and small hills in the north.

The region around Sapanca is an important destination for day trips and weekend vacations.

[2] Anguillidae Atherinidae Clupeidae Cobitidae Cyprinidae Esocidae Gobiidae Centrarchidae Percidae Petromyzontidae Salmonidae Siluridae Syngnathidae https://web.archive.org/web/20101105212503/http://www.fisheriessciences.com/tur/Journal/vol1/issue3/jfscom2007018.pdf