It ranges from an altitude of 5,753 m ( 18,875 ft ) above sea level at its source at Indira Col ( pass ) on the China border to its snout at 3,620 m ( 11,875 ft ) It falls from an altitude of 5,753 m ( 18,875 ft ) above sea level at its head at Indira Col on the China border down to 3,620 m ( 11,875 ft ) at its terminus .