Salmon Brook
Salmon Brook looking downstream, Dunstable MA.jpg
Salmon Brook in Dunstable, Massachusetts
Salmon Brook (Merrimack River tributary) is located in Massachusetts
Salmon Brook (Merrimack River tributary)
Salmon Brook (Merrimack River tributary) is located in New Hampshire
Salmon Brook (Merrimack River tributary)
Salmon Brook (Merrimack River tributary) is located in the United States
Salmon Brook (Merrimack River tributary)
CountryUnited States
New Hampshire
CountiesMiddlesex, MA,
Hillsborough, NH
CommunitiesDunstable, MA, Nashua, NH
Physical characteristics
SourceLower Massapoag Pond[1]
 • locationGroton, MA
 • coordinates42°40′7″N 71°29′39″W / 42.66861°N 71.49417°W / 42.66861; -71.49417
 • elevation154 ft (47 m)
MouthMerrimack River
 • location
Nashua, NH
 • coordinates
42°44′55″N 71°26′30″W / 42.74861°N 71.44167°W / 42.74861; -71.44167
 • elevation
95 ft (29 m)
Length9.3 mi (15.0 km)
Basin size36 square miles (93 km2)
 • average150 cu ft/s (4.2 m3/s)
Basin features
 • leftHauk Brook, Joint Grass Brook, Hassells Brook
 • rightBlack Brook, Old Maids Brook

Salmon Brook is one of the six major tributaries of the Merrimack River in northeastern Massachusetts in the United States. Its watershed is 31 square miles (80 km2) and is one of the 14 subwatersheds of the Merrimack River. It passes through Dunstable, Massachusetts, and Nashua, New Hampshire.

Route description

Salmon Brook begins at the outlet of Lower Massapoag Pond near the center of Dunstable.[1] It then flows approximately 9.3 miles (15.0 km) north-northeast to the Merrimack River. The water body farthest upstream in the watershed is Martins Pond just east of the center of the town of Groton. The outlet, Martins Pond Brook, runs southeast to Lost Lake/Knops Pond, the start of a chain of lakes that includes Whitney Pond, Cow Pond, and Upper and Lower Massapoag ponds. All of these water bodies are dammed. Salmon Brook runs roughly parallel to the Nashua River for its entire course from Lower Massapoag Pond to the Merrimack River.

See also


  1. ^ a b "Salmon Brook". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.