Sonprayag is a place of religious significance located enroute to Kedarnath Dham. Prayag means confluence and Sonprayag lies at the confluence of two holy rivers Basuki and Mandakini. There is a common belief among people that bathing in the river can wash away their sins.

At a distance of 4 km from Gaurikund, 18 km from Kedarnath and 70 km from Rudraprayag, Sonprayag lies at an altitude of 1,829 meters. It is a proposed y-forked railway junction on Chhota Char Dham Railway for two different railways going to Kedarnath and Badrinath.