[3][4] The Burhi Gandak originates from Chautarwa Chaur near Bisambharpur in the district of West Champaran in Bihar.

Thereafter, the river flows in a south-easterly direction through the Muzaffarpur district for about 32 kilometres (20 mi).

[3] The Burhi Gandak runs a zig-zag course through the districts of Samastipur and Begusarai before covering a short distance in Khagaria district, running by the side of the town of Khagaria, and flows into the Ganges near Gogri and near Bairarpur in Munger .

It forms the western boundary of the Khagaria town and a protection embankment built along the eastern side of this river, protects Khagaria town from the floods of Burhi Gandak.

[3] The main tributaries of the Burhi Gandak are - Masan, Balor, Pandai, Sikta, Tilawe, Tiur, Dhanauti, Kohra, Anjankote, Danda and lauriya , .