The West Branch of the Delaware River (also called the Mohawk Branch) spans approximately 90 miles (140 km) from the northern Catskill Mountains to its confluence with the Delaware River's East Branch at Hancock, New York.The last 6 miles (9.7 km) forms part of the boundary between New York and Pennsylvania.. The West Branch rises in Schoharie County, New York at 1,886 …

The Susquehanna River (/ ˌ s ʌ s k w ə ˈ h æ n ə /; Lenape: Siskëwahane) is a major river located in the Mid-Atlantic region of the United States, overlapping between the lower Northeast and the Upland South.At 444 miles (715 km) long, it is the longest river on the East Coast of the United States. By watershed area, it is the 16th-largest river in the United States, and also the ...