PA 390 passes through Skytop before it crosses the county line and runs through Promised Land State Park.

PA 90 was shifted to a more direct alignment between Paradise Valley and Cresco in the 1940s, with the former section becoming unnumbered.

The road turns north-northeast and passes over a Delaware-Lackawanna Railroad line before heading through the community of Cresco.

The route becomes Krummel Hill Road and runs through more dense forests with some residential development, heading through Skytop before passing to the east of Mountain Lake and winding north.

[2][3] PA 390 enters Greene Township in Pike County and becomes Promised Land Road, heading north and northwest through dense forested areas.

The road heads north through Roemersville before turning east and northeast as it runs through more forests with some private residential developments.

At this time, the entire road north of Canadensis was paved except for a portion near Promised Land State Park.

In addition, PA 90 was shifted east to a new direct alignment between Paradise Valley and Cresco, leaving the former section unnumbered.