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Cooper Lake, located near Lake Hill in the Town of Woodstock, Ulster County, New York, is the largest natural lake in the Catskill Mountains. However, it has been expanded somewhat over the years since it serves as the main reservoir for the nearby City of Kingston[1] and Town of Ulster, which stores water there that it pipes from Mink Hollow Stream in addition to the water that reaches the lake from its 8.6-square mile (22.4 km²) drainage basin.

Cooper Lake
Cooper Lake.jpg
from Twin Mountain
LocationUlster County, New York
Coordinates42°03′36″N 74°10′41″W / 42.060°N 74.178°W / 42.060; -74.178Coordinates: 42°03′36″N 74°10′41″W / 42.060°N 74.178°W / 42.060; -74.178
Typenatural lake, reservoir
Basin countriesUnited States
Surface areaapprox. 150 acres (61 ha)
Surface elevation1,080 ft (330 m)

It holds roughly 1.2 billion US gallons (4,500,000 m3) to the city a year; providing an average of 4.6 million US gallons (17,000 m3) a day to Kingston and Ulster.[2]

Swimming and fishing in Cooper Lake are prohibited.

The area of Cooper Lake and the surrounding grounds is owned by City of Kingston Water Department.[3]