NandaPrayag is the second prayag in the cascade sequence of the confluences where the Nandakini River joins the main Alaknanda River. According to one tale, a noble King Nanda performed yagna and sought blessings of God. Hence, the confluence is named after him.
The other version of the legend states that the confluence derives its name from the Yadava king Nanda, the foster-father of God Krishna. According to the legend, Vishnu granted a boon of the birth of a son to Nanda and his wife Yashoda and also the same boon to Devaki, wife of Vasudeva. Placed in a dilemma, since both were his disciples, he ensured that Krishna, an incarnation of Vishnu, was born to Devaki and Vasudeva but was fostered by Yashoda and Nanda. There is temple of Gopal(another name of God Krishna).