<P> The Hudson River is 315 miles (507 km) long, with depths of 30 feet (9.1 m) for the stretch south of the Federal Dam, dredged to maintain the river as a shipping route . Some sections there are around 160 feet deep, and the deepest part of the Hudson, known as "World's End" (between the US Military Academy and Constitution Island) has a depth of 202 feet (62 m). </P> <P> The Hudson and its tributaries, notably the Mohawk River, drain an area of 13,000 square miles (34,000 km), the Hudson River Watershed . It covers much of New York, as well as parts of Connecticut, Massachusetts, New Jersey, and Vermont . </P> <P> Parts of the Hudson River form coves, such as Weehawken Cove in the towns of Hoboken and Weehawken in New Jersey . </P> <P> New York Harbor, between the Narrows and the George Washington Bridge, has a mix of fresh and ocean water, mixed by wind and tides to create an increasing gradient of salinity from the river's top to its bottom . This varies with season, weather, variation of water circulation, and other factors; snowmelt at winter's end increases the freshwater flow downstream . </P>

Where is the mouth of the hudson river located