Kolahoi Glacier, the largest glacier in Kashmir, is spread over an area of 11 sq km at an elevation of 4700 m. Part of the mighty Kolahoi Peak, this glacier is also the source of the Lidder River, the main source of Kashmirs largest river, Jhelum.Kolahoi Glacier, other than being a hanging glacier, is also known for its breath taking views and is a major trekking destination. The trek to Kolahoi Glacier starts from Aru, 10 km from Pahalgam, and passes through terrain mostly under snow, along the course of Lidder River, through thick forests inhibited by wild animals.The trail to the glacier is considered arduous and it is advised to take a guide on the trek. Since the trail is under snow throughout the year, snow trekking gear including gumboots will be necessary.Global warming and rising temperatures have resulted in the shrinking of the glacier over the years. Being the main source of water for Kashmir, this has become a threat to the water supply to thousands of people in the regionSituated at a distance of 26 km from Pahalgam, Kolahoi Glacier can be reached by foot. One can also visit Sonamarg, located 15 km away.