Rachel Carson Run is a long tributary of the Allegheny River located in Allegheny County in the U.S. state of Pennsylvania. Rachel Carson Run flows through Harrison Hills Park and joins the Allegheny River within Harrison Township. The stream is named after ecologist Rachel Carson. See also List of rivers of Pennsylvania List of tributaries of the Allegheny River References External links U.S. Geological Survey: PA stream gaging stations Rivers of Pennsylvania Tributaries of the Allegheny River Rivers of Allegheny County, Pennsylvania Run