Halfway Rock Lighthouse is a lighthouse located on a barren ledge in Casco Bay, Maine. The lighthouse tower, which has a height of 76ft, and the attached ex-boathouse are all that remain, as the other buildings have been taken away in storms. The name "Halfway Rock" comes from the position of the rock which is halfway between Cape Elizabeth and Cape Small, the southwest and northeast extremities of Casco Bay, which are about 18nmi apart.Halfway Rock Light was added to the National Register of Historic Places as Halfway Rock Light Station on March 14, 1988.
