<P> Long Island Sound is a tidal estuary of the Atlantic Ocean, lying between the eastern shores of Bronx County, New York City, southern Westchester County, and Connecticut to the north, and the North Shore of Long Island, to the south . From west to east, the sound stretches 110 miles (177 km) from the East River in New York City, along the North Shore of Long Island, to Block Island Sound . A mix of freshwater from tributaries and saltwater from the ocean, Long Island Sound is 21 miles (34 km) at its widest point and varies in depth from 65 to 230 feet (20 to 70 m). </P> <Table> <Tr> <Th> Part of a series of articles on </Th> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Th> Topics </Th> </Tr> <Tr> <Td> <Ul> <Li> Geography </Li> <Li> History </Li> <Li> Economy </Li> <Li> Transportation </Li> <Li> Politics </Li> <Li> People </Li> <Li> Popular culture </Li> <Li> Recreation </Li> <Li> Law enforcement </Li> <Li> Viticulture </Li> </Ul> </Td> </Tr> <Tr> <Th> Regions </Th> </Tr> <Tr> <Td> <Ul> <Li> Brooklyn </Li> <Li> Queens </Li> </Ul> <Ul> <Li> Nassau County </Li> <Li> Suffolk County </Li> </Ul> <Ul> <Li> Municipalities </Li> </Ul> <Ul> <Li> North Shore </Li> <Li> South Shore </Li> </Ul> <Ul> <Li> North Fork </Li> <Li> South Fork </Li> </Ul> <Ul> <Li> Long Island Sound </Li> <Li> Barrier islands </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table>

How deep is the water in long island sound