Zanskar valley is lies to the South west of Leh, surrounded by the Himalayan and Zanskar ranges. It is the most isolated of all the trans- Himalayan valleys. Zanskar comprises two main valleys of Stod (Doda chu) and Lungnak (Tsarap chu), which converge below at Padum. The valley has an area of about 5,150 sqr. Kms. and is situated at an elevation of 13,000 ft. The area remains closed in winter for nearly 6 months in the year. Due to heavy snow falls. As winter approaches all the high passes get close and the river freeze on the surface. Zanskari people walk along the frozen river to reach the Indus River in Nimoo village, which is known as the Chadar trek. The only way to get a zanskar in winter through the Chaddar, which means white river blanket sheet, also says in zanskar typical name Hkado sanglam.