McPherson’s Ridge is a branch of Oak Ridge which lies across Chambersburg Pike (U.S. 30). Some of the fiercest fighting of the battle took place here on July 1. The ridge takes its name from the farm of Edward McPherson, whose barn still stands. The ridge rises some fifty feet above Willoughby Run to its west and is about the same height as Seminary Ridge to its east, separated by two shallow swales. To its north (to the right in the photo) it slopes gradually upward to Oak Hill, about a mile away and 70 feet higher in elevation. One of the Railroad Cuts extends laterally through the ridge, paralleling the Chambersburg Pike.

The photo shows McPherson Ridge from the east. On the left is the McPherson barn, with U.S. 30 running from the right side of the picture past the monuments to General Reynolds, the 149th Pennsylvania, and the 2nd Maine Battery.