The Concord River is a 16.3-mile-long (26.2 km) 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.
The Concord River at the Old North Bridge, Concord, Massachusetts, circa 1900.
Canoes on the Concord River
The Merrimack River is a 117-mile-long (188 km) river in the northeastern United States. It rises at the confluence of the Pemigewasset and Winnipesaukee rivers in Franklin, New Hampshire, flows southward into Massachusetts, and then flows northeast until it empties into the Gulf of Maine at Newburyport. From Pawtucket Falls in Lowell, Massachusetts, onward, the Massachusetts–New Hampshire border is roughly calculated as the line three miles north of the river.
Mouth of Merrimack River in Newburyport, Massachusetts, in 2021
The Merrimack River in Pembroke, New Hampshire
The Merrimack as it flows from Haverhill to its mouth in Newburyport, Massachusetts
Merrimack River in Lowell, Mass.