Buluan River

The Buluan River is a black river in the provinces of Maguindanao del Sur and Sultan Kudarat in the island of Mindanao, Philippines. Located in Buluan joint by the Liguasan Marsh stream of the Rio Grande de Mindanao. The total length of the Buluan River system including the upper is 109 km (68 mi) and 36.5 km (22.7 mi) from Lake Buluan to Liguasan Marsh.