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. This pass is an ancient trade route between the people on either side of Pir Panjal. The local name for this pass is a generic name of pass. There are many other passes in Lahaul and Spiti which have specific names (Kunzam La, Baralacha La, etc.). This is suggestive of the fact that this must have been the oldest and most frequented pass in the region, or the fact that it is the main pass leading from one cultural region to another, quite different one, to the north. 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. A waterfall on the way to Rohtang Several episodes of the History Channel's Ice Road Truckers series spinoff IRT Deadliest Roads dealt with truckers crossing the Rohtang Pass to deliver supplies. With increase in Traffic at Rohtang Valley, Environmentalists fear its impact on the fragile mountain ecology. A rise in average temperature, and the consequent melting of glaciers, are also issues of severe concern. The pass was featured on the Top Gear: India Special.
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