[3] The river descends for about 2,200 feet (670 m) from its source as it flows for 21 miles (34 km) before draining to the sea.

[8] The lake and the river are used for both commercial and sport fishing, as well as for recreational activities such as boating and swimming.

The river in its entirety, however, is not navigable because the current in some areas reaches a velocity of up to thirty miles an hour.

[3] However, the hydroelectric plants and the requisite regulatory dams have changed the fluctuations of the water level of Lake Lanao, affecting the indigenous people, and producing conflicts with the local population.

[10] In Maranao mythology, Lake Lanao once threatened to drown the people of Sebangan with its ever-rising waters.