SUNSET ROCKS TRAIL - 1st segment
From I-81, take Exit 37 (Newville) and drive 8 miles on 233 South. When you arrive at Pine Grove Furnace State Park, 233 makes a right turn. After that right turn, take the first right (very soon), on Old Shippensburg Road. Stay on that road until it peters out and stops after 1.2 miles. There are parking spots there.
Remember, the Appalachian trail has WHITE blazes, and Sunset Rocks Trail has BLUE blazes.
The AT goes perpendicular to the road where you parked, you need to find the first blue signal, as seen in the first photo. You want to go forward, not left, not right.
The first segment of the hike is quite steep, southbound, and uphill. It is not too long and you should be done in 20 minutes.