Bartlett's Island: is a residential island within the marshlands of Marshfield, Massachusetts. The island is located in the North and South River Estuary, surrounded by the salt marshes of the historic North River and is bordered by Macomber's Creek to the south and the North River to the north, just downhill from "The Hills" The rivers' watershed is a great tidal marsh with fantastic fish and wildlife habitats (on its isolated Islands - Truants and Pine Island, which are in the adjacent "English Salt Marsh" bordering the South River). The North River is a river, approximately 12 miles long formed by the confluence of the Indian Head River and Herring Brook flowing from Pembroke, MA to Scituate.