Charles River, river, eastern Massachusetts, U.S. It is the longest river wholly within the state, meandering slightly more than 80 miles (130 km) from its source in Hopkinton, southern Middlesex county, to its mouth on Boston Harbor. The river follows a winding course (south, northeast, north
Maps Boston — Mystic River Watershed Association
Charles River Reservation
Charles River Dam, Charles River, Massachusetts Tide Station
Angela Zhang - Once and Future City
View of the bridge over Charles River
Charles River Reservation
1722 Boston Massachusetts Map - Framed Vintage Boston - History
19th-century manuscript plan of the Charles River Lower Falls
How Boston Made Itself Bigger
Charles River Watershed Association
Historic Map - Watertown, MA - 1879
Charles River, Massachusetts, Map, & History