The Seneca River is a large river that begins as the outflow of Seneca Lake (Seneca County), and flows eastward for approximately 61 miles to Three-Rivers (Onondaga County) where it combines with the Oneida and Oswego Rivers, with the Oswego River then emptying into Lake Ontario. The Barge Canal, Erie Canal, and Cayuga-Seneca Canal systems are all part of the Seneca River.
Main gamefish found in the river are walleye, tiger musky, northern pike, largemouth and smallmouth bass. Panfish found in the river are black crappie, yellow perch, bluegill, white perch, and brown bullhead. Other popular fish found in the river are channel catfish, carp and sheephead (freshwater drum). The Seneca River has become a popular fishing location for bass and carp tournament anglers.
More information can be found at the New York State Department of Environmental Conservation website.