The Siachen Glacier (Urdu: سیاچن گلکئر) is in the eastern Karakoram range in the Himalaya Mountains along the disputed India-Pakistan interim border at approximately . It is the longest glacier in the Karakoram and second longest in the world's non-polar areas. 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)
- Siachen Glacier is 70 km long; Tajikistan's Fedchenko Glacier is 77 km long. The second longest in the Karakoram Mountains is the Biafo Glacier at 63 km. Measurements are from recent imagery, supplemented with Russian 1:200,000 scale topographic mapping as well as the 1990 "Orographic Sketch Map: Karakoram: Sheet 2", Swiss Foundation for Alpine Research, Zurich.