Other notable Allegheny highpoints include Thorny Flat on Cheat Mountain ( 4,848 ft/1478 m ) , Bald Knob on Back Allegheny Mountain ( 4,842 ft/1476 m ) , and Mount Porte Crayon ( 4,770 ft/1,454 m ) , all in West Virginia ; Dans Mountain ( 2,898 ft/883m ) in Maryland , Backbone Mountain ( 3360 ft/1024 m ) , the highest point in Maryland ; Mount Davis ( 3,213 ft/979 m ) , the highest point in Pennsylvania , and the second highest , Blue Knob ( 3,146 ft/959 m ) .