Pennsylvania Route 663 (PA 663) is a state highway in Montgomery and Bucks counties in southeast Pennsylvania. Its southern terminus is at PA 100 in the borough of Pottstown and its northern terminus is at PA 309 and PA 313 in the borough of Quakertown, where the road continues eastward as PA 313. Along the way, PA 663 also passes through the borough of Pennsburg. It is called John Fries Highway between Pennsburg and Quakertown. It has an interchange with Interstate 476 (I-476, Pennsylvania Turnpike Northeast Extension) at exit 44 west of Quakertown. The route was assigned in 1930, and it has had several realignments since its commissioning, including two major ones. Route description PA 663 begins at an intersection with PA 100 in the borough of Pottstown in Montgomery County, heading east on four-lane undivided West King Street. The road passes between commercial areas to the north and the Pottsgrove Manor historic house museum to the south, crossing the Colebrookdale branch operated by the Colebrookdale Railroad at-grade and Manatawny Creek. The route becomes two-lane undivided King Street and is lined with residences. PA 663 turns north onto North Charlotte Street and continues past homes, curving to the northeast. The road crosses Mervine Street and becomes the border between Upper Pottsgrove Township to the northwest and Lower Pottsgrove Township to the southeast, running through a mix of residential and commercial areas. The route turns east to fully enter Lower Pottsgrove Township before it curves back to the northeast, again following the border between Upper Pottsgrove Township and Lower Pottsgrove Township past the Keim Street intersection. PA 663 continues through wooded areas with a few homes and enters New Hanover Township. The road runs through more rural areas with some development and comes to the Swamp Pike intersection in the community of New Hanover. Farther northeast, PA 663 intersects PA 73 in the community of Layfield and turns east to form a concurrency with that route on Big Road. The road crosses Swamp Creek before PA 663 splits from PA 73 by heading northeast on Layfield Road. The route runs through farmland and woodland with some development, passing through the community of Hoffmansville. Farther northeast, the road heads into Upper Hanover Township and crosses the Green Lane Reservoir along the Perkiomen Creek. PA 663 heads into the borough of Pennsburg, where it becomes Pottstown Avenue and runs past homes and a