Hudson River Watershed

River Facts

The Hudson River flows from Lake Tear of the Clouds in the Adirondacks, (from Lake -Feldspar Brook feeds into Opalescent River which feeds into Hudson River) through New York Harbor to the mouth of the estuary in New Jersey.

The Hudson River is over 325 miles long and from Troy to New York Harbor is a tidal estuary, approximately 153 miles long. The Hudson River Estuary is a drowned river valley which was also partially glacially excised.

The Mahican originally called the river the Muh-he-kun-ne-tuk, which means “great waters in constant motion” or, more loosely, “river that flows two ways”.

The Hudson River is as deep as 200 feet in some places and can be as wide as 3.5 miles.

More than 206 species of fish live in the river.

The Hudson River watershed drains approximately 13,390 square miles and encompasses 11 major sub-watersheds.

More than 65 major tributaries flow into the Hudson River, with the Mohawk River as the largest tributary.

The Hudson River watershed is home to almost 5 million people, and encompasses

5 states: New York, Vermont, Massachussetts, Connecticut, and New Jersey.

Ninety-three percent of the Hudson River watershed lies in New York State.

Twenty-five percent of the Hudson River basin is used for agriculture, 60% is forested, and 8% is urban.

Almost 60% of the water in the watershed is used for commercial or industrial purposes. 

Watershed Facts

The Hudson River Watershed is the 13,390-square-mile land mass from which water drains into the Hudson River. It lies in the United States with 93% in New York State, 3% in Massachusetts, 2% in New Jersey and 1% in Connecticut.

The Hudson River Watershed contains three large sub-watersheds which in turn contain many smaller sub-watersheds. See our maps section for more information.