Ganga its origin at the source Gaumukh (the shape of the ice forming like a cow's mouth), gushing from the depths of Gangotri glacier. The Glacier is high and mighty at a height of4255 m above sea level and is approx 24 km in length and 7-8 km in width. It is known as Bhagirathi after King âÂÂBhagirath in itâÂÂs initial phase of long journey. It emerges in the ice caves of Gangotri glacier and gushes down to join river 'Alaknanda' and becomes Ganga. The ancient holy scriptures are full of legends associated with river Ganga.