The Allegheny River flows approximately 325 miles through Pennsylvania and New York, originating in Potter County, Pennsylvania before looping north into New York state and eventually returning to Pennsylvania. In New York, the river runs approximately 104 miles through Cattaraugus, Chautauqua, Allegany, and Steuben counties. The Allegheny is characterized by diverse habitats, from shallow riffles with gravel and clay bottoms to deeper pools, supporting one of the most biologically diverse aquatic systems in the northeastern United States. With 71 different fish species documented, the river offers exceptional fishing opportunities year-round, though conditions vary significantly by season and location. The river's depth ranges from shallow sections to deeper pools near dams that can reach 40 feet or more, creating varied habitats that support different fish species throughout its length.