The Siachen Glacier is in the eastern Karakoram Range in the Himalaya Mountains along the disputed India-Pakistan border. The Karakoram Range forms a great watershed that separates China from the Indian subcontinent and is sometimes called the Third Pole. The glacier lies between the Saltoro Ridge immediately to the west and the main Karakoram Range to the east. At long, it is the longest glacier in the Karakoram and second-longest in the world's non-polar areas. It falls from an altitude of above sea level at its source at Indira Col on the China border down to at its snout. Saser Kangri is the highest peak in the Saser Muztagh, the easternmost subrange of the Karakoram Range in India, Saser Kangri I having an altitude of .