The western terminus of the route is at PA 87 in Farragut, a hamlet of Upper Fairfield Township.

PA 864 continues winding for a couple miles, curving back and forth between the northeast and southeast.

The winding nature continues into a stretch of houses separated by long driveways after Good Shepherd Road.

This is short-lived, as PA 864 continues through Mill Creek, passing several farms before entering the hamlet of Huntersville.

The dense woods continue for another mile before PA 864 enters the borough of Picture Rocks, where it gains the moniker Laurel Run Road through downtown.