 The roadway continues east as George Washington Memorial Parkway, which serves the estate then follows the Potomac River as a four-lane automobile parkway north to Alexandria and Washington.SR 235 turns north onto Mount Vernon Highway, a two-lane highway without access controls that passes through the Mount Vernon community.The state highway passes Mount Vernon High School and meets SR 623 (Old Mount Vernon Road) on a tangent before reaching its northern terminus at US 1 (Richmond Highway) in Hybla Valley.