The Beas rises in the Pir Panjal range near the Rohtang Pass and flows about in Himachal Pradesh. The river is formed by a numerous of tributaries; the major tributaries are the Parbati, the Hurla, the Sainj, the Uhl, the Suheti, the Luni, the Banganga and the Chaki. The northern and eastern tributaries of the river are snow fed and perennial, while the southern ones are seasonal. During the month of August, increase in the inflow sometimes results in floods.