Island Pond (Rockingham County, New Hampshire) Island Pond (Rockingham County, New Hampshire) Island Pond (sometimes referred to locally as Big Island Pond) is a water body located in Rockingham County in southern New Hampshire, in the towns of Derry, Hampstead and Atkinson. The pond is near the head of the Spicket River watershed, which feeds the Merrimack River in Lawrence, Massachusetts. The pond was formed from the merger of two smaller bodies of water in 1878, when a dam raised the water level by 8.5 feet. The pond is named for Governor's Island, a island that lies within it. The island in turn is named for
Wellesley Island the St. Lawrence River, which surrounds Wellesley Island on three sides. The island bounds an internal body of water, the Lake of the Isles, which nearly doubles its waterfront. The easternmost peninsula of the island lies across the Upper (American) Narrows from the Village of Alexandria Bay. An arterial highway, Interstate 81, crosses Wellesley Island. Five segments composing the Thousand Islands International Bridge link the island to the opposite shores of the river. Said to be "the smallest vehicular international bridge in the world," one of the bridges crosses a narrow channel, the International Rift, which separates Wellesley Island in