The Harlem River is a tidal strait in New York City that separates the boroughs of Manhattan and the Bronx. It connects the East River to the Hudson River and is approximately 3.5 miles long. The river plays a significant role in local transportation and has several bridges, including the famous Harlem River Lift Bridge. Historically, the Harlem River has been important for trade and transportation. It was named after the Dutch settlement of Haarlem in the Netherlands. The river is also known for its recreational opportunities, including fishing and boating, making it a vital part of the community.