The EAST River is a tidal estuary in New York City that connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates the boroughs of Manhattan and Queens on the west bank from the Bronx and Brooklyn on the EAST bank. The Harlem River is a tidal strait in New York City that connects the Hudson River to the EAST River and separates the boroughs of Manhattan and the Bronx. It is approximately 8 miles long and up to 600 feet wide.