The river whose source lies near Rohtang Pass is the Beas River. It originates from a place called Beas Kund, a freshwater lake near Rohtang Pass in the Kullu district of Himachal Pradesh. The Beas River rises at an elevation of about 4,361 meters (14,308 feet) on the southern face of Rohtang Pass and flows southward through the Kullu Valley before eventually joining the Sutlej River in Punjab
. Rohtang Pass acts as a watershed between the Beas basin on the southern side and the Chenab basin on the northern side, with the Beas River emerging from underground near the pass and flowing southward
