About Rohtang Pass
Rohtang Pass (pile of corpses, due to people dying in bad weather trying to cross the pass) (elevation 3,978 m (13,050 ft)) is a high mountain pass on the eastern Pir Panjal Range of the Himalayas around 51 km (32 mi) from Manali. It connects the Kullu Valley with the Lahaul and Spiti Valleys of Himachal Pradesh, India.
The pass is open from May to November. It is not particularly high or difficult to cross on foot by Himalayan standards, but it has a well-deserved reputation for being dangerous because of unpredictable snowstorms and blizzards
National Highway 21 (NH 21), the road through the Kullu Valley, past Manali and over the Rohtang Pass to Keylong, and Lahul and on to Leh in Ladakh, has become very busy during the summer months as an alternate military route, following the Kargil Conflict in 1999 in addition to tensions in Kashmir. Traffic jams are common as military vehicles, trucks, and goods carriers try to navigate the tight roads and rough terrain, compounded by snow and ice at certain points and the large number of tourist vehicles.
The matter was taken up by the National Green Tribunal following which it has restricted number of Petrol and Diesel vehicles for tourism purpose to 800 and 400 respectively per day. Any person wishing to visit the pass for tourism purpose has to book a permit online through the website