Western Pennsylvania Rails and Trails

1971 USGS State Map
North Eastern section (Erie - Sharon) 622K
North Central section (Bradford - Brockway) 539K

Baltimore & Ohio
B&O (CSX) Mainline Youngstown -
  (Bike Trail on former Interurban right of way next to B&O - Struthers to New Castle)
Parker - Mount Jewett
Salmanca - Mount Jewett (portions shared with Erie)

Bessemer & Lake Erie
Conneaut - Pittsburgh Mainline
  (Erie Extension Canal Towpath Trail)
Meadville Branch Ernst Bike Trail

Erie
Erie (EL/CR) Main Line Levittsburg (OH) - Salmanca (NY)
Erie Bradford Branch

New York Central
(CR) Clarion Secondary (Ashtabula - Shippenville)
  (Three sections are official open trails)

Pennsylvania Railroad
Erie and Pittsburgh (PRR) Erie - Jamestown - Pittsburgh
  (Two sections between Jamestown and Linesville are official bike trails)
Allegheny Valley
  (Armstrong, Allegheny and Samuel Justice Trails along Allegheny River)