Devils Back in Massachusetts, USA, is a very small and barren rock in Massachusetts Bay located within the city limits of Boston.[1] The rock is northeast of Aldridge Ledge, southwest of Commissioners Ledge, northwest of Half Tide Rocks, west of Green Island, and just east of the South Channel.
42°21′06″N 70°54′23″W / 42.351699°N 70.906389°W