Concord River

Concord River
The Concord River at the Old North Bridge, Concord, Massachusetts, circa 1900.
Location
Country	United States
Physical characteristics
Source
• location	Sudbury and Assabet Rivers, Concord, Massachusetts
• coordinates	42°27′55″N 71°21′29″W / 42.4654°N 71.3580°W / 42.4654; -71.3580
• elevation	50 ft (15 m)
Mouth
• location	Merrimack River, Lowell, Massachusetts
• coordinates	42°38′47″N 71°18′09″W / 42.6465°N 71.3025°W / 42.6465; -71.3025
Length	16.3 mi (26.2 km)
Basin size	377 sq mi (980 km2)
National Wild and Scenic River
Type	Recreational
Designated	April 9, 1999

The Concord River is a 16.3-mile-long (26.2 km)^[1] tributary of the Merrimack River in eastern Massachusetts, United States. The river drains a small rural and suburban region northwest of Boston. As one of the most notable small rivers in U.S. history, it was the scene of an important early battle of the American Revolutionary War and was the subject of a 19th-century book by Henry David Thoreau.