The road passes through woodland with some homes within South Buffalo Township, running through the community of Dock Hollow.

Farther north, the route enters a mix of farmland, woods, and residences as it heads more to the northeast and passes through Kerr.

PA 128 turns northeast onto Prospect Avenue and passes more residences before crossing back into North Buffalo Township and becoming Ford City Road.

The route turns southeast and comes to the Ford City Veterans Bridge over the Buffalo and Pittsburgh Railroad and the Allegheny River, entering Manor Township.

PA 128 curves northeast and heads into the borough of Ford City, becoming 5th Avenue as it passes numerous homes.