Beacon Reservoir supplies water to the 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. It holds 125 e6USgal. A publicly accessible dirt road, frequently used to climb the mountain, runs from the city past it to the summits. No boating or fishing or swimming is allowed in the reservoir. It is the highest lake in Dutchess County.