Salang Pass is a major mountain pass in Afghanistan. It provides direct connection between the Kabul region with areas in northern Afghanistan. The pass is at an elevation of 3878 meters.
The road through Salang Pass in Afghanistan
Source: http://commons.wikimedia.org/wiki/File:Afghanistan_passo_del_salang_hindukush.jpg Author: Maksim
The Salang Pass also cross the Hindu Kush Mountains. However the Soviets improved the route by constructing the Salang Tunnel, which runs underneath the pass at a height of 3,400 m above sea level. This provides a link for Kabul and Charikar with Mazar-e Sharif and Termez.
Due to the extreme nature of the weather in the area, Salang Pass has been hit by avalanches numerous times, causing many deaths. In 1982, the Salang Tunnel caught fire, the casualties being an unpublished number of Soviet troops.
Entrance to Salang Tunnel in Afghanistan
Source: http://commons.wikimedia.org/wiki/File:Salang_tunnel_entrance.jpg Author: Michal Vogt
River flowing down near Salang Pass
Source: http://commons.wikimedia.org/wiki/File:Salang_road_creek.jpg Author: Sven Dirks, Wien