Maryland State Route 17 is a north-south highway in Western Frederick County. It runs from the Maryland/Virginia State Line, at the Potomac River, to the Frederick/Washington County Line. MD St Rt 17 passes through the following towns in Frederick County. Brunswick Rosemont Burkittsville Middletown Myersville Ellerton Wolfsville MD St Rt 17 is not multi-plexed in Frederick County. MD St Rt 17 intersects the following highways in Frederick County. Maryland State Route 478, at Brunswick. Maryland State Route 79, at Rosemont. Maryland State Route 464, at Rosemont. Maryland State Route 871, at Rosemont. U.S. Rt. 340, near Rosemont. Maryland State Route 383, near Broad Run. ALT U.S. Rt. 40, near Middletown. Interstate 70, near Myersville. U.S. Rt. 40, near Myersville.
