From Wikipedia, the free encyclopedia Jump to: navigation, search Coordinates: 40°52′55″N 76°47′51″WWest Branch Susquehanna River River Williamsport0124.jpgThe eastern side of Williamsport, seen from the southeast on Bald Eagle Mountain. In the foreground is the West Branch of the Susquehanna River. Beyond Williamsport can be seen the higher part of the dissected Allegheny Plateau. CountryUnited States StatePennsylvania RegionsCambria County, Indiana County, Clearfield County, Clinton County Part ofSusquehanna River Tributaries - left Sinnemahoning Creek, Pine Creek, Larrys Creek, Lycoming Creek, Loyalsock Creek, Muncy Creek - right Chest Creek, Anderson Creek, Clearfield Creek, Bald Eagle Creek, White Deer Hole Creek SourceAllegheny Mountains - location Near Carrolltown, Cambria County - coordinates 40.59871°N 78.72311°W MouthSusquehanna River - location Northumberland, Northumberland County - elevation 423 ft (129 m) - coordinates 40°52′55″N 76°47′51″W [1] Length243 mi (391 km), West-east Basin6,847 sq mi (17,734 km2) [2] Dischargefor Lewisburg - average 11,229 cu ft/s (318 m3/s) [3] - max 287,000 cu ft/s (8,127 m3/s) [4] Map of the West Branch Susquehanna River watershed The West Branch Susquehanna River is one of the two principal branches, along with the North Branch, of the Susquehanna River in the northeastern United States. The North Branch, which rises in upstate New York, is generally regarded as the extension of the main branch, with the shorter West Branch being its principal tributary.