The Shaksgam River is a left tributary of the Yarkand River. The river is also known as the Kelechin River and Muztagh River. It rises in the Gasherbrum, Urdok, Staghar, Singhi and Kyagar glaciers in the Karakoram. It then flows in a general northwestern direction parallel to the Karakoram ridge line in the Shaksgam Valley. It receives the waters of the Shimshal Braldu River and the Oprang River from the Pakistan-administered Hunza District before turning east and joining the Yarkand River. The stretch of the river's course between Shimshal Braldu and Oprang is used as the Pakistan–China border.