Arlington Ridge Road (originally known as Mount Vernon Avenue) is a street through residential areas and business districts in Arlington County, Virginia in the United States. South Arlington Ridge Road is roughly 1.5 miles in length and extends from Prospect Hill Park/Army-Navy Drive in the north to Glebe Road and Four Mile Run creek in the south. As it crosses the creek it turns into Mount Vernon Avenue. Arlington Ridge Road was first constructed in 1840, and formerly extended north through Arlington National Cemetery to Rosslyn, Virginia near Francis Scott Key Bridge and the Potomac River.