• 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.

Air Quality

Located at the summit unit of Allegheny Portage Railroad NHS is an air monitoring station which collects rain and snowfall to measure acidic and mercury air pollutants. Precipitation is collected weekly and analyzed by the PA Atmospheric Deposition Monitoring Network and the National Atmospheric Deposition Program's Mercury Deposition Network. Results are published in annual reports.

Did You Know?

Blair Gap Run stream in woods

Blair Gap Run is a headwater mountain stream running in and out of Allegheny Portage Railroad National Historic Site. Originating near Cresson, PA, it courses down the Allegheny Front eventually making its way to the Juniata and Susquehanna Rivers and the Chesapeake Bay.