Prior to European settlement in the early 17th century, Native Americans of the Pennacook tribe lived in the area, and used both the Back River and parent Powwow River for transportation and fishing.

[3] The Back River rises in Kensington, New Hampshire, and flows southeast, almost immediately entering the town of South Hampton.

The river turns south and enters Massachusetts in Amesbury, joining the Powwow River at tidewater just downstream from the city's center at the falls of the Powwow.

You can help Wikipedia by expanding it.This article related to a river in Massachusetts is a stub.

You can help Wikipedia by expanding it.This article related to a river in New Hampshire is a stub.