Lake Gilead is a 116-acre (0.47 km2) controlled lake located in Carmel Hamlet in Putnam County, New York. Originally known as Dean's Pond, it is 0.8 miles long, has a mean depth of 43 feet (13 m), and a maximum depth of approximately 120 feet (37 m). The lake is located within the lower Hudson River basin in the Croton River watershed. Lake Gilead is part of the Croton Watershed of the New York City water supply system. A dam and spillway are located on its southern end, with a 500' shore-to-shore set-back restricting boaters from the area.