Hackensack River Hackensack River The Hackensack River is a river, approximately 45 miles (72 km) long, in the U.S. states of New York and New Jersey, emptying into Newark Bay, a back chamber of New York Harbor. The watershed of the river includes part of the suburban area outside New York City just west of the lower Hudson River, which it roughly parallels, separated from it by the New Jersey Palisades. It also flows through and drains the New Jersey Meadowlands. The lower river, which is navigable as far as the city of Hackensack, is heavily industrialized and forms a commercial extension
North Branch Raritan River in Branchburg and Bridgewater Townships. North Branch Raritan River The North Branch Raritan River is a tributary of the Raritan River in central New Jersey in the United States. The North Branch Raritan River rises in Morris County, in eastern Mendham Borough rising out of Mendham Commons Pond, and flows generally southward into Somerset County, around the southern end of the Watchung Mountains. At its end, it forms the border between Bridgewater and Branchburg Townships, and upon reaching the border of Hillsborough Township, joins the South Branch Raritan River to form the main Raritan River, which generally flows eastward from