Fulton County PA 655 begins at the
Maryland border in
Thompson Township in
Fulton County, where the road continues south into that state as North Pennsylvania Avenue toward the town of
Hancock. From the state line, the route heads north on two-lane undivided Thompson Road, passing through a mix of farmland and woodland with some homes. The road intersects the eastern terminus of
PA 484 and continues through more rural areas, bending to the north-northeast. PA 655 crosses into
Belfast Township and runs through agricultural areas and woods before it bends west and heads into the residential community of
Needmore, where it comes to an intersection with
US 522. At this point, PA 655 turns north for a
concurrency with US 522 on Great Cove Road, passing through a mix of farmland and development and curving northeast and east. PA 655 splits from US 522 by turning north onto Pleasant Ridge Road and heading into forested areas. The road curves northeast and north, continuing through a mix of farm fields and woodland with a few residences. The route curves northwest and northeast before it reaches the community of Pleasant Ridge. PA 655 enters
Licking Creek Township and turns northeast and southeast as it runs through farmland and woodland. The route turns north to remain along Pleasant Ridge Road and heads north-northeast through forested areas with some farm fields and homes, passing through the community of Andover. The road winds through more rural areas a short distance to the west of
Licking Creek, reaching an intersection with
US 30 in the community of
Harrisonville. Past the US 30 intersection, PA 655 winds north-northeast through forests with some farmland, crossing into
Dublin Township. Here, the road turns to the northwest and winds through more rural land before coming to a bridge over
I-76 (
Pennsylvania Turnpike). Following this, the route heads north and crosses into
Taylor Township, where it runs through residential areas in the community of
Hustontown. PA 655 comes to an intersection with SR 4014 (Pitt Street), which heads east a short distance to connect to
PA 475, at which point PA 655 turns west onto Pitt Street. The route leaves Hustontown and becomes Waterfall Road, heading through farmland with some homes and curving northwest. The road runs through forested areas before it passes through agricultural areas and turns to the north. PA 655 runs through a mix of farm fields and woodland, passing through the community of Gracey. Farther north, the route passes through forests and comes to a junction with the eastern terminus of
PA 913 in the community of
Waterfall, where it turns east-southeast to remain along Waterfall Road. The road runs between farmland to the north and forested areas to the south before making a turn to the north. PA 655 enters the borough of
Mapleton and becomes Campbell Street, heading into residential areas and turning southeast onto Main Street. The route turns northeast onto Bridge Street and passes under
Norfolk Southern's
Pittsburgh Line before it comes to a bridge over the
Juniata River, at which point it leaves Mapleton for
Brady Township. After the bridge, PA 655 turns north onto Oriskany Road, running through forested areas to the east of the river. The road heads north-northeast further away from the river and passes east of an industrial plant before it comes to an intersection with
US 22. At this point, PA 655 heads north concurrent with US 22 on
William Penn Highway, which carries one northbound lane and two southbound lanes. The road passes through forests to the east of the Juniata River and Norfolk Southern's Pittsburgh Line. The two routes curve northeast away from the river and railroad tracks, becoming a three-lane road with two northbound lanes and one southbound lane. The road turns to the north-northwest and narrows to two lanes before entering the borough of
Mill Creek, where it passes development and gains a
center left-turn lane. PA 655 splits from US 22 by turning northeast onto two-lane undivided Big Valley Pike, running through residential areas. The road leaves Mill Creek for Brady Township and heads north-northeast through forests before turning northeast through the community of Fousetown. The route turns east into wooded areas with some residences before a curve to the northeast. After entering the valley, the route runs through farm fields with some homes and passes through the communities of Airydale and Sharpsburg. ==History==