Elk Hill, also known as North Knob or Elk Mountain, is a mountain in Herrick Township, Pennsylvania. It is the highest mountain peak in Pennsylvania east of the Susquehanna River and the highest peak on the Allegheny Plateau. Elk Hill rises conspicuously above the surrounding landscape. The mountain actually has two peaks. The main summit of North Knob is 2693 ft, and the lower summit known as South Knob is 2602 ft. It is home to Elk Mountain Ski Area which has a 1000 ft vertical drop and 27 ski trails.