 Here, PA 872 comes to the community of Costello and turns west onto Costello Road, crossing the First Fork Sinnemahoning Creek into Portage Township.The road turns northwest into more rural areas and continues into the borough of Austin, where it becomes Costello Avenue and passes a few homes.The route turns to the north and comes to an intersection with the southern terminus of PA 607, becoming Rugaber Street and running through more residential areas.