Bhagirathi and Alaknanda are the two headstreams of the Ganga, Bhagirathi is fed by the Gangotri Glacier and joined by the Alaknanda and by passing from here it meets at Devaprayag in Uttarakhand. At Haridwar the Ganga emerges from the mountains on to the plains. The Ganga is also joined by many tributaries from the Himalayas.