Lake Baao is a shallow freshwater lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 located in Baao

Baao, Camarines Sur

Baao is a 3rd class municipality in the province of Camarines Sur, Philippines. According to the 2007 census, it has a population of 52,466 people.-Barangays :Baao is politically subdivided into 30 barangays.-Schools:...

, Camarines Sur

Camarines Sur

Camarines Sur is a province of the Philippines located in the Bicol Region in Luzon. Its capital is Pili and the province borders Camarines Norte and Quezon to the north, and Albay to the south...

 in Bicol Region

Bicol Region

The Bicol Region or Bicolandia is one of the 17 regions of the Philippines. Its regional center is Legazpi City...

, Luzon

Luzon

Luzon is the largest island in the Philippines. It is located in the northernmost region of the archipelago, and is also the name for one of the three primary island groups in the country centered on the Island of Luzon...

, Philippines

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

. It has an estimated surface area of 177 hectares (1.77 km²) and reaches an average of only 1 meter deep. The lake is fed by local run-off and several small rivers, the most important of which is the Tabao River, which flows from another lake, Lake Buhi

Lake Buhi

Lake Buhi is a lake found in Buhi, Camarines Sur, Philippines.It has an area of 18 square kilometres and has an average depth of 8 meters. The lake lies in the valley formed by two ancient volcanoes, Mt. Asog and Mt. Malinao. It was created in 1641, when an earthquake caused a side of Mt. Asog to...

. The water from the lake then drains west into the Bicol River

Bicol River

Bicol River is the eight largest river in the Philippines in terms of drainage basin size with an estimated catchment area of 3,770 km². The river drains the southwestern part of the island of Luzon and passes through Camarines Sur, Albay, and Camarines Norte provinces in the Bicol Region.The...

.

During summer months (March-May), the surface area of the lake shrinks leaving only one third of its original size, about 60 ha (0.6 km²).