Adjacent to Marathon Key is a natural body of water called Boot Key Harbor. Boats can enter through two waterway access points and inlets into the harbor from the Atlantic Ocean. The western entrance has a controlled depth of about six feet at mean low water and is considered the main channel. The harbor is popular with boaters and sailboats due to its natural protections from the weather elements and is truly a beautiful place to stay with a boat when visiting this area of the Fl Keys.
