At this point, the Indus River meets the Gilgit River. The Indus is 3,200 km long, making it the 3rd longest river in Asia and the 21st longest in the world. Gilgit is the river that originates from the Shandur Lake at a height of approximately 12,000 foot. This river is a tributary of the Indus River and flows past the town of Gilgit. Gilgit River is also referred to as the Ghizar River.