Natrona is an unincorporated community in Harrison Township, Allegheny County in the U.S. state of Pennsylvania. It is located in western Pennsylvania within the Pittsburgh Metropolitan Statistical Area, approximately 24 miles (39 km) northeast of Downtown Pittsburgh. Natrona is situated along the Allegheny River at Lock and Dam Four, Pools Three and Four between Brackenridge, Natrona Heights, Karns, Allegheny Township, and Lower Burrell.
The Pennsalt Historic District, settled c. 1850, in Natrona
The Lock and Dam Number Four spans the Allegheny River between Natrona in Harrison Township (below) and Lower Burrell (above).
The Allegheny River is a 325-mile-long (523 km) headwater stream of the Ohio River that is located in western Pennsylvania and New York in the United States. It runs from its headwaters just below the middle of Pennsylvania's northern border, northwesterly into New York, then in a zigzag southwesterly across the border and through Western Pennsylvania to join the Monongahela River at the Forks of the Ohio at Point State Park in Downtown Pittsburgh, Pennsylvania.
The Allegheny River with Freeport, Pennsylvania in the background
Much of the Allegheny River's course is through hilly woodlands.
The Highland Park Bridge crosses the Allegheny River at Aspinwall, Pennsylvania, just above Allegheny River Lock and Dam No. 2.
The headwaters of the Allegheny River are in this meadow in Potter County