Baltimore-Washington Parkway in National Capital Parks-East Located near Washingron D.C. and Baltimore, Maryland, MD TRAVEL BASICS - CAMPING - LODGING ACTIVITIES - FACILITIES - FEES/PERMITS washington baltimore parkway (NPS Photo) IN BRIEF Opened in 1954, the parkway is a 29-mile scenic highway that connects Baltimore, Maryland with Washington, D.C. The part of the parkway from Washington, D.C.