East of Warren, the Allegheny River is a popular tailwater fly fishery.
The best section for fly fishing the Allegheny River is from Kinzua Dam downstream west to Warren where you can find brown trout and rainbow trout. There is good access on both sides of the river. On the north shore, there is fly fishing access on the Allegheny River provided by Hemlock Road. On the south shore, there is access provided by SR59.
Overall, Allegheny River is the 44th most popular fly fishing river of all 49 fly fishing spots in Pennsylvania.