Gangotri Glacier is located in Uttarkashi District, Uttarakhand, India in a region bordering Tibet. This glacier, one of the primary sources of the Ganges, is one of the largest in the Himalayas with an estimated volume of over 27 cubic kilometers. The glacier is about 30 kilometres long and 2 to 4 km wide. Around the glacier are the peaks of the Gangotri Group, including several peaks notable for extremely challenging climbing routes, such as Shivling, Thalay Sagar, Meru, and Bhagirathi III. It flows roughly northwest, originating in a cirque below Chaukhamba, the highest peak of the group.