Rohtang Pass is a high mountain pass on the eastern Pir Panjal Range of the Himalayas arround 51 km from Manali. It connects the Kullu valley with the Lahul and Spiti valleys of Himachal Pradesh, India. Manali-Leh Highway, a part of NH 21, transverses Rohtang Pass.
Manali is the gateway to Rohtang pass beyond which lie the valley of Lahul and Spiti. In winter the mountain slopes are clad and they turn into perfect skiing slopes. This point is one of main attraction for the tourists coming to Manali.
This pass opens for tourist from April end to October end of the year. The permission to travel on this highway is given by Indian army after they clear the snow and inspect the road for its fitness and safety for movement of person and the vehicles. This road also connects to Leh ladakh, State of Jammu and Kashmir, form Manali, state of Himachal Pradesh. Sonepani Glacier and small lake, Dashahr, are located opposite and left to Rohtang respectively.
The pass provides a natural divide between the humid Kullu valley with a primarily Hindu culture and the arid high- altitude lahul and Spiti valley with a Buddhist culture.
The pass lies on the watershed between the chenab and Beas basins on the southern side of this pass. The Beas River emerges from underground and southward and on its northern side, the Chandra river, flows from the eastern Himalayas a source stream of the Chenab, flows westward.