Balasun is one of the main rivers of North Bengal and Darjeeling Districts.

[1] Balasun rises from the Jorebunglow below Tiger Hill, Sukhia (about 18 km from Darjeeling town) and flows towards the south east into the plains of North Bengal, where it joins the Mahananda River.

The Balsun passes between the valley of Pokhriabong, Dhotreia T. E, Cedars T.E, Nagari Fram T. E, Moonda Kotee T. E (8 km below Sonada Town), Balasun T. E., Ambootia T. E.[citation needed] Above the river Balasun ginger, cardamom, oranges and other regional crops are cultivated.

The river attracts local visitors to fish, camping and the visiting point called Intake(Cedars Tea Estate), near Pulbazar in Malat.

It has great significance for fertility of the soil in the region in Bungkulung, Dudhia, Panighatta, Nakxal etc.