<P> The Allegheny River rises in north central Pennsylvania , on Cobb Hill in central Potter County , approximately 10 miles ( 16 km ) south of the New York border . It flows west past Coudersport then turns north at Port Allegany and proceeds into western New York , looping westward across southern Cattaraugus County for approximately 30 miles ( 48 km ) , past Portville , Olean , St. Bonaventure University and Salamanca and flowing through Seneca Indian Nation lands close to the northern boundary of Allegany State Park before re-entering northwestern Pennsylvania approximately 20 miles ( 32 km ) southeast of Jamestown , New York . </P>
<P> The Allegheny River rises in north central Pennsylvania , on Cobb Hill in central Potter County , approximately 10 miles ( 16 km ) south of the New York border . It flows west past Coudersport then turns north at Port Allegany and proceeds into western New York , looping westward across southern Cattaraugus County for approximately 30 miles ( 48 km ) , past Portville , Olean , St. Bonaventure University and Salamanca and flowing through Seneca Indian Nation lands close to the northern boundary of Allegany State Park before re-entering northwestern Pennsylvania approximately 20 miles ( 32 km ) southeast of Jamestown , New York . </P>
where is the headwaters of the allegheny river
where is the headwaters of the allegheny river
in north central Pennsylvania , on Cobb Hill in central Potter County , approximately 10 miles ( 16 km ) south of the New York border
in north central Pennsylvania , on Cobb Hill in central Potter County , approximately 10 miles ( 16 km ) south of the New York border