Beacon Reservoir supplies water to the to city of Beacon, in Dutchess County, New York, United States. It is located at 1,285 feet (392 m) above sea level in a hollow between Beacon Mountain and Scofield Ridge, in the neighboring Town of Fishkill, very close to the Putnam County line. It was created in 1922 by damming Dry Brook, a tributary of Fishkill Creek.