Mamostong Kangri is the highest mountain range in the remote subrange of the Karakoram range, Rimo Muztagh in Kashmir in India. It is located in the southeast direction of the snout of the Siachen Glacier. Located at a height of 7,516 meters (24,659 feet) above mean sea level, Mamostong Kangri is the forty eighth highest independent peak in the world. On the slopes of the Mamostong Kangri there are a number of glacier namely, the South Chong Kumdan Glacier, Kichik Kumdan (Thangman), Mamostong, and South Terong Glaciers.

Geographically, the mountain is located between 35°08`27North latitude and 77°34`39 East longitude. The mountain prominence( it is a measure of vertical separation between mountains) of Mamostong Kangri is 1,083 meters. The parent mountain of Mamostong Kangri is Gasherbrum I.