What Is Gaumukh Glacier? Gaumukh is the main snout of the Gangotri Glacier and is considered the physical source of the River Ganga. The glacier is approximately 30 km long and is located high in the Garhwal Himalayas of Uttarakhand. Spiritually, the origin of the Ganga is associated with Gangotri Temple, but geographically, the river…