Before the
Great September Gale of 1815, Sandy Point was the farthest extension of Napatree Point, forming a small, sickle-shaped peninsula on the western edge of
Watch Hill, Rhode Island. Following the storm, virtually all of the trees on the once-forested peninsula were destroyed, allowing the coastal vegetation to occupy the landscape. Even during the period when it was connected to the mainland, Sandy Point was never built upon.
Fort Mansfield, situated at the elbow of the peninsula, marked the end of the developed portion of the land. In 1926, following the closure of the fort, the federal government put Fort Mansfield and all the land beyond it (that is, Sandy Point) up for sale. A New York developer proposed Sandy Point be subdivided into 674 lots and in response a syndicate of Watch Hill residents purchased the land to prevent the construction of the "cheap little houses" that might change the exclusive character of their village. Prior to the 1938 Hurricane making landfall on the Northeastern United States, Napatree and Sandy Points formed a single peninsula. When the hurricane struck the coast, it destroyed all the houses on Napatree Point and cut several channels into the peninsula. Only one of those channels proved to be permanent; that breach separated Sandy Point from Napatree Point just beyond the site of the former fort. To this day Sandy Point remains an island, leaving Napatree Point as the westernmost point on mainland Rhode Island. In 1940, Sandy Point was deeded to Alfred Gildersleeve of Stonington, Connecticut. The Gildersleeve family gave Sandy Point to the Avalonia Land Conservancy in 1982 to be protected and used as a nature preserve. == Geography and geology ==