The Rajang River is a river in Sarawak, Malaysia. The river is located in northwest of Borneo and it originates in the Iran Mountains. The river flows approximately 563 km to the South China Sea, making it the longest river in Malaysia. The biggest town on the river is Sibu, some 60 kilometers upriver from the mouth of the Rajang. The next major settlement upriver is Kanowit built on the mouth of Kanowit River at the bank of Rajang River.
Borneo, the third largest island in the world and has one of the most diverse eco systems on the planet, its primary rain forest home to a vast number of species of flora and fauna. Now part of Eastern Malaysia, Sarawak was ruled for exactly one hundred years by the Brooke family, known as the Raja Brookes, and only joined the British Empire after the war, gaining independence in 1966.