Lake Trakošćan (Croatian: Trakošćansko jezero) is an artificial lake located in Trakošćan, Hrvatsko Zagorje, Croatia. The lake measures about 1.5 kilometres (1 mi) in length,[1] and around 17 hectares (42 acres) in area. Its average depth is 2.5 metres (8 ft). The water reaches temperatures up to 28 °C (82 °F) in summer. The lake freezes over for three months during the winter. At its inception, the lake functioned as a fish pond, but retained its architectural importance to the present day.[2]