Race Rock Lighthouse

Thousands of years ago Long Island Sound was a large oval lake, carved out by the last Ice Age. At some point in time, the easternmost wall of this large lake eroded or otherwise collapsed, allowing the ocean to ebb and flow throughout the sound. The wall from Long Island to Connecticut, running northeast, consists of Plum, Little Gull and Fisher Islands as well as Valient Rock and Race Rock reefs. The remainder of this "wall" is below water, mostly 40 to 83 feet below low water.