Nissitissit River

Nissitissit River
Nissitissit River in Brookline, New Hampshire
Nissitissit River is located in New Hampshire
Nissitissit River
Nissitissit River is located in Massachusetts
Nissitissit River
Nissitissit River is located in the United States
Nissitissit River
Location
CountryUnited States
StatesNew Hampshire, Massachusetts
CountiesHillsborough, NH, Middlesex, MA
TownsBrookline & Hollis, NH; Pepperell, MA
Physical characteristics
SourcePotanipo Pond
 • locationBrookline, NH
 • coordinates42°44′10″N 71°40′20″W / 42.73611°N 71.67222°W / 42.73611; -71.67222
 • elevation264 ft (80.5 m)
MouthNashua River
 • location
Pepperell, MA
 • coordinates
42°40′18″N 71°33′53″W / 42.67167°N 71.56472°W / 42.67167; -71.56472
 • elevation
168 ft (51 m)
Length10.5 mi (16.9 km)
TypeScenic
DesignatedMarch 12, 2019

The Nissitissit River is a 10.5-mile-long (16.9 km)[1] river in southern New Hampshire and northern Massachusetts in the United States. It is a tributary of the Nashua River, itself a tributary of the Merrimack River, which flows to the Gulf of Maine. This river is part of the Nashua River Watershed.

The Nissitissit River begins at the outlet of Potanipo Pond in the town of Brookline, New Hampshire. It flows southeast at a very mild gradient, crossing the southwest corner of Hollis, New Hampshire, before entering Massachusetts, where it joins the Nashua River in the town of Pepperell.