Biogradsko Jezero is a lake in Kolašin municipality, in northern Montenegro. It is a glacial lake, located on the Bjelasica Mountain, within Biogradska Gora national park. Biogradsko Jezero is located in the heart of Biogradska Gora national park, on an altitude of 1,094 meter. It is the biggest and most attractive lake of 7 glacial lakes scattered across the national park. It has an area of 228,500 m², and average depth of 4,5 meter. The maximum depth is 12,1 meter. The lake is 870 meter long and 261 meter wide.