It begins at the confluence of the Bhagirathi and Alaknanda rivers at Devprayag in Uttarakhand. It is 2,525 km (1,569 mi) long. The Ganges is known to be the most sacred river to Hindus.

The Alaknanda is one of the two main headstreams of the Ganges River, meeting the Bhagirathi River at Devprayag to form the ...