A local legend says that Harsil got its name from the rivers Bhagirathi and the Jalandhari as once they had an argument over their significance. Lord Vishnu, also known as Hari, was asked to intervene. He turned himself into a great stone, a shila, and absorbed their anger. Even today, after Hari-shila (or Harsil), the waters of the two rivers have become a little less turbulent.