The Susquehanna River is a very large river in the northeastern United States. It is 444 miles long and the longest river on the East Coast. The Susquehanna discharges an average of 40,080 cubic feet per second of water.
The Susquehanna River starts at Otsego Lake in Cooperstown in Otsego County, New York, at an elevation of 1,180 feet. The West branch starts at an elevation of 1,980 feet in Cambria County, Pennsylvania.
The Susquehanna River mouth is in the Chesapeake Bay in Maryland.
The Unadilla River flows into the Susquehanna at Sidney, the Chenango River in downtown Binghamton, and the Chemung River in the Athens Township just south of the Pennsylvania border south of Waverly, NY.