At the Spring Mill Road intersection, the route becomes township-maintained and winds its way southeast. The road heads through the community of Gladwyne, where it passes homes and a few businesses, before it crosses Mill Creek and makes a turn to the north and a curve southeast in forested areas. At Hollow Road, PA 23 becomes state-maintained again and winds southeast through more wooded residential areas.
Past this, the route becomes Crawford Avenue and curves to the east past commercial development. The road turns south and becomes Conshohocken State Road, passing under I-76. PA 23 enters Lower Merion Township and curves southeast, passing through forested areas of residential development.