The Hudson River is a 315-mile long river that flows from the Adirondack Mountains in upstate New York to the Upper New York Bay and into the Atlantic Ocean. It is one of the major rivers in the United States and is an important waterway for transportation and commerce. The Hudson River has been an important part of New York's history since the 17th century, when it was first explored by Henry Hudson. It is also known for its scenic beauty and is a popular destination for recreational activities such as fishing, boating, and swimming.