The river Ganga originates from?

In the Uttarkashi district of Uttarakhand, close to Gaumukh (3,900 m), the Gangotri glacier is where the River Ganga originates. It is referred to as the Bhagirathi here. It forms narrow canyons that slash through the Central and Lesser Himalayas. The Bhagirathi meets the Alaknanda near Devprayag and starts flowing as the Ganga river.