What county in Massachusetts has a state forest and an island that the Rowley River runs by?
Holy Island, Massachusetts:  The island is situated immediately west of Plum Island and is part of the Town of Ipswich in Essex County. Ipswich, Massachusetts: Ipswich is a coastal town in Essex County, Massachusetts, United States. Ipswich, Massachusetts:  Home to Willowdale State Forest and Sandy Point State Reservation, Ipswich includes the southern part of Plum Island.
i don't know