The Zaskar Range lies to the north of the main Himalaya. It acts as a backbone of Ladakh south of the Indus River, extending from the ridges beyond Lamayuru in the west across the Zanskar region; there it is divided from the main Himalaya by the Stod and Tsarap valleys, the Zanskar valley. On the east of the Zanskar region the range continues through the Lahaul and Spiti district and Pangi of the Chamba. While in the north it continues across the Kinnaur before extending towards west across Uttarakhand. Some of the main passes are the Fatu La, on the Leh-Srinagar road, while the main trekking passes into the Zanskar valley are Singge La, the Cha Cha La and the Rubrang La.