Hulu Mentaya

Hulu Mentaya lies in the upper basin of the Mentaya River, also called the Sampit, in southern Borneo. The river runs south from the interior to Sampit Bay and the Java Sea. North of its lower course it receives a number of tributaries, which drain a wide area of forested country. The neighbouring Katingan basin carries another river from the island's highlands toward the same southern coast.