Rattlesnake River

Rattlesnake River
Location
CountryUnited States
StateNew Hampshire
CountyStrafford
TownsFarmington
Physical characteristics
Source 
  locationFarmington
  coordinates43°21′25″N 71°4′50″W / 43.35694°N 71.08056°W / 43.35694; -71.08056
  elevation710 ft (220 m)
MouthCocheco River
  location
Farmington
  coordinates
43°21′59″N 71°2′10″W / 43.36639°N 71.03611°W / 43.36639; -71.03611
  elevation
238 ft (73 m)
Length3.6 mi (5.8 km)

The Rattlesnake River is a 3.6-mile-long (5.8 km) river in eastern New Hampshire in the United States. It is a tributary of the Cocheco River, part of the Piscataqua River watershed leading to the Atlantic Ocean.

The river is located entirely in the town of Farmington. It rises north of Hussey Mountain and Chesley Mountain and flows east to the Cocheco, dropping nearly 500 feet (150 m) in elevation over its length.