PA 234 begins at an intersection with US 30 in Franklin Township, Adams County, heading north on two-lane undivided Buchanan Valley Road.

The road runs through farms and forests with some homes, turning northeast and passing through Trust.

PA 234 continues southeast a short distance to the northeast of the creek on Narrows Road.

The route enters the borough of Arendtsville and becomes North High Street, passing homes.

The route heads into the borough of Biglerville and intersects the western terminus of PA 394, becoming West York Street and passing residences.

[2][3] PA 234 turns northeast and heads back into Butler Township, becoming Heidlersburg Road and running through more open agricultural areas with occasional homes.

The road curves more to the east and crosses into Tyrone Township, running through more rural areas.

PA 234 crosses the Conewago Creek into the borough of East Berlin and becomes West King Street, passing homes along with a few businesses.