This abandoned railway line was initially part of a network of Pennsylvania RR secondary routes that served the mining regions of Pennsylvania, south of Hollidaysburg. Judging by the SPV and DeLorme atlases, the line survived the Penn Central years but was abandoned under Conrail (1976 or later).
The route passed through rural villages and small towns. The pictures are presented from south to north.
Thanks to Mike Palmer for contributing information about this route.