Lake Dapao is a deep water lake located in the province of Lanao del Sur, southwest of Lake Lanao, in the southern island of Mindanao, Philippines. It is one of the deepest lakes[2] in the country, reaching a maximum depth of 120 metres (390 ft). It has an estimated surface area of 1,011 hectares (10.11 km2). The lake receives water from local run-off and several small rivers.