Shyamvarn bamak on the western side. Nilamber Glacier on the eastern side both these Glaciers are tributaries of Raktvarn Bamak which drain itself at Gangotri Glacier. From the snout of Gangotri Glacier which was called Gomukh emerges Bhagirathi river. one of the main tributaries of river Ganga that later joins Alaknanda River the other main tributaries of river Ganga at Devprayag and became Ganga there after.