• Photo of Lemon House, Level #6, and Engine House on a beautiful summer day.

    Allegheny Portage Railroad

    National Historic Site Pennsylvania

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  • Road Closure

    Please be aware that part of the public area loop has been closed until further notice as the park starts preparatory efforts for this summer's paving project on the Picnic Area Road.


Allegheny Portage Railroad's Main Unit is located at the juncture of three Pennsylvania River Regions. To the north, headwaters of Bradley Run flow toward Clearfield and the West Branch of the Susquehanna River. To the east, the headwaters of Blair Gap Run eventually flow to the Juniata River. The third region, the Lower Allegheny and Monongahela Rivers, is fed by headwaters originating southwest of the park. Because the Allegheny Portage Railroad followed Blair Gap, that Run is the main stream located within the park.

Did You Know?

Viaduct in 1885 before the great Johnstown Flood

The Conemaugh Viaduct was used by trains even after the Portage Railroad closed. The Johnstown Flood of 1889 washed the original viaduct away, but a replacement was completed within 3 days of the flood.