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
Deception Island an elevation of , and over half the island is covered by glaciers. The centre of the island is a caldera formed in a huge (VEI-6) eruption which has been flooded by the sea to form a large bay, now called Port Foster, about long and wide. The bay has a narrow entrance, just wide, called Neptune's Bellows. Adding to the hazard is Ravn Rock, which lies below the water in the middle of the channel. Just inside Neptune's Bellows lies the cove Whalers Bay, which is bordered by a large black sand beach. Several maars line the inside rim