The Baker-Brook River rises in Lac Baker (New Brunswick) (length: 7.9 kilometres (4.9 mi); height: 205 metres (673 ft)).

The mouth of the Lac Baker (New Brunswick) is located in the middle of the lake on the northeast shore.

This mouth is located at: From Lac Baker, the Baker-Brook River flows over 26.3 kilometres (16.3 mi), as follow: The Baker-Brook River flows on the north shore of Saint John River (Bay of Fundy) in Baker Brook, opposite Baker Island that belongs to an archipelago of islands in the area.

In this sector, the Saint John River (Bay of Fundy) is the border between Canada (New Brunswick) and the United States (Maine).

The confluence of the Baker-Brook River is located at: The term "Baker" is an English original family surname.