The Suru River is a 185 kilometres (115 mi) long river, that originates from the Panzella glacier which lies at Pensi La pass near the Drang Drung Glacier. The Drang Drung Glacier also gives rise to the Stod River which flows down in the opposite direction from the Suru. The source of the Suru River lies 142 kilometres (88 mi) south of Kargil town, and 79 kilometres (49 mi) north from Zanskar. Srinagar, the capital of Jammu and Kashmir lies 331 kilometres (206 mi) to the west. The Suru River forms the western and northern boundary of the Zanskar Range. The river flows westwards, along with the Kargil-Zanaskar Road, from its source and forms the Suru valley, which is towered by the massif of Nun Kun mountain. It drains the Nun Kun mountain massif of the Zanskar Range in the Suru valley, and is joined by a tributary “Shafat Nala“ at the pastures of Gulmatango. This stream originates from the Shafat Glacier. The Suru River then flows northwards through a deep, narrow gorge to Kargil town, where it is fed by the Botkul River which originates from the glacier of the same name. The Dras River, fed by the Shingo River, joins the Suru River at Kharul, 7 kilometres (4.3 mi) north of Kargil town. The Suru River then enters the Pakistani Administered Kashmir 5 kilometres (3.1 mi) ahead from the point of merger of Dras and Suru rivers through Post 43 and Post 44 of India and Pakistan respectively and merges with the Indus River at Nurla.