Directions to Greencastle-Antrim High School Back to Directions Directions to Greencastle-Antrim High School 300 S Ridge Ave., Greencastle, PA 17225 Travel on I-81 and take the PA-16 exit- EXIT 5 (Waynesboro / Greencastle). Turn onto PA-16 / BUCHANAN TRAIL EAST traveling toward Greencastle (from the north, turn right; from the south, turn left). Turn LEFT onto SOUTH RIDGE AVENUE (at the Besore Library). After arriving at the second stop sign, the High School is on your left. Turn in the driveway just passed the G-A school campus sign. Park and enter at the main entrance to the High School. Back to Directions
