 The route passes through rural areas of Berks County, crossing U.S. Route 222 (US 222) in Maiden Creek before heading southeast through Oley and Boyertown.PA 73 continues into Montgomery County and intersects PA 100 in Gilbertsville and PA 29 in Schwenksville before it heads into the northwest suburbs of Philadelphia.The route passes through Skippack and intersects US 202 in Center Square, PA 309 in Springfield Township, and PA 611 near Jenkintown.