The Allegheny River ( ) is a long headwater stream of the Ohio River in western Pennsylvania and New York, United States. The Allegheny River 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 on the "Point" of Point State Park in Downtown Pittsburgh, Pennsylvania. The Allegheny River is, by volume, the main headstream of both the Ohio and Mississippi Rivers. Historically, the Allegheny was considered to be the upper Ohio River by both Native Americans and European settlers. The shallow river has been made navigable upstream from Pittsburgh to East Brady by a series of locks and dams constructed in the early 20th century. A 24-mile long portion of the upper river in Warren and McKean counties of Pennsylvania and Cattaraugus County in New York is the Allegheny Reservoir also known as Lake Kinz
El río Allegheny ( ) es una larga corriente del río Ohio en el oeste de Pensilvania y Nueva York, Estados Unidos. El río Allegheny corre desde sus aguas profundas justo debajo del medio de la frontera norte de Pensilvania hacia el noroeste a Nueva York, luego en un zig-zag al suroeste a través de la frontera y a través del oeste de Pensilvania para unirse al río Monongahela en los Forks de Ohio en el "Punto" de Point State Park en Downtown Pittsburgh, Pennsylvania. El río Allegheny es, por volumen, el principal flujo principal de ambos los ríos Ohio y Mississippi. Históricamente, el río Allegheny fue considerado como el río superior de Ohio por los nativos estadounidenses y los colonos europeos. El río Shell ha sido navegable desde Pittsburgh a East Brady por una serie de cerraduras y estanques construidos en el comienzo del siglo 20.