Beginning at the intersection of 37th and Upton Streets in northwest D.C., east on Upton Street to Reno Road, south on Reno Road to Tilden Street, east on Tilden Street to Park Road, southeast on Park Road to Rock Creek, south along Rock Creek to the National Zoo, west around the northern boundary of the National Zoo to Connecticut Avenue, south on Connecticut Avenue to Cathedral Avenue, west on Cathedral Avenue to the National Cathedral Close, north and west around the Cathedral Close to Wisconsin Avenue, north on Wisconsin Avenue to Quebec Street, east on Quebec Street to 37th Street, and north on 37th Street back to the intersection with Upton Street. In each case where a street is named, buildings facing both sides of the street are included.