"Doggett's Castle" was a steep metamorphic granite cliff reaching over one hundred feet above the Sheepscot River on the east side of Westport Island.

Captain Samuel Doggett (1685-1745) reportedly anchored his vessel, The Dolphin, beneath this sheer ledge to trade with the Native people of the region.

Since the only approach to this mooring spot was by water, Captain Doggett reportedly felt it was safe and called it his "castle." The name has remained.