[DOC] [TLE] Charles River - Wikipedia [PAR] The Charles River is an 80 mi (129 km) long river in eastern Massachusetts. 
From its source in Hopkinton the river flows in a northeasterly direction (after first 
coursing due south through Milford), traveling through 23 cities and towns before 
reaching the Atlantic Ocean at Boston. .... Today's Charles River basin between 
Boston and Cambridge is almost... [DOC] [TLE] Mystic River - Wikipedia [PAR] The Mystic River is a 7.0-mile-long (11.3 km) river in Massachusetts, in the United 
States. ... Mouth, Boston Harbor ... The river joins the Charles River to form inner 
Boston Harbor. .... Lydia Maria Child described her journey across the Mystic to 
her grandfather's house in the poem "Over the River and Through the Wood. [DOC] [TLE] Boston Harbor - Wikipedia [PAR] Boston Harbor is a natural harbor and estuary of Massachusetts Bay, and is 
located adjacent to ... By 1660 almost all imports came to the greater Boston area 
and the New England coast through the waters of Boston Harbor. ... The inner 
harbor extends from the mouths of the Charles River and the Mystic River, both of 
which... [DOC] [TLE] MWRA State of Boston Harbor [PAR] Massachusetts Water Resources Authority home page ... The largest rivers 
draining into Boston Harbor are the Charles, the Neponset, and the Mystic. ... The 
river mouth, originally a tidal estuarine saltmarsh, has been dammed since th4e 
... Only five miles long, much of the river flows through dense residential and 
industrial... [DOC] [TLE] Charles River | river, Massachusetts, United States | Britannica.com [PAR] River, eastern Massachusetts, U.S. It is the longest river wholly within the state, ... 
its source in Hopkinton, southern Middlesex county, to its mouth on Boston 
Harbor. ... and east) before dividing Cambridge and Boston to the west side of the 
harbour. ... The Charles River flowed through the Back Bay to Boston Harbor and
... [DOC] [TLE] Charles River [PAR] Located in eastern Massachusetts, the Charles River is a small American 
waterway ... and passes through fifty-eight cities and towns before emptying into 
Boston Harbor. ... by filling in areas of water around the Back Bay and Charles 
River mouth. ... of Boston's and Cambridge's lands and further affected the flow of 
the river,... [DOC] [TLE] boston harbor watershed - Mass.Gov [PAR] Weir River forms a 6 acre impoundment as it flows to Boston Harbor. ... River 
herring enter the pond when the tide gate is properly adjusted. ..... Boston, 
Cambridge, Watertown, Waltham, Newton, Weston, Wellesley, .... from the river's 
mouth. ... .A locking protocol for moving river herring through the Amelia Earhart 
Dam and... [DOC] [TLE] Charles River History | Charles River Watershed Association [PAR] Because of its meandering nature, the river flows through 23 communities, ... and 
as a link in the route from southeastern Massachusetts to northern New England. 
... 43 mills along the 9.5-mile tidal estuary from Watertown Dam to Boston Harbor. 
... the Lower Charles River, and to build a dam at the mouth to keep out tides,... [DOC] [TLE] The Charles River, Eastern Massachusetts: Scientific Information in ... [PAR] The Charles River flows for 83 miles from its source in Hopkinton, Massachusetts 
to its mouth at Boston Harbor .... water are conveyed through the .... Impounded 
freshwater basin, lower Charles River, Boston and Cambridge, Massachusetts. [DOC] [TLE] Charles River in Cambridge Still a Boston Favorite | Somerville, MA ... [PAR] Jun 5, 2013 ... The Charles River in Cambridge, MA is an 80-mile long river that flows ... It 
specifically starts at Echo Lake in Hopkinton before it empties itself at the Boston 
Harbor. ... actually 26 miles from the mouth, and the river only drops at 350 feet ... 
Through the years, the Charles River drops slowly in elevation, and... [DOC] [TLE] About the Charles River | Urban Waters - The Charles River | US EPA [PAR] Jun 21, 2016 ... The Charles River flows 80 miles from Hopkinton, Mass. to Boston Harbor. ... 
From there, the river flows through the municipalities of Milford

Question: Boston Harbor is the mouth of this river that flows through Cambridge, Massachusetts
Answer: Charles River