Owasco Lake is 11.1 miles (17.9 km) long, with a maximum width of 1.3 miles (2.1 km). The lake reaches a maximum depth of 177 feet (54 m) and has a surface elevation of 712 feet (217 m) above sea level, controlled by a dam on the lake's outlet.[4] The lake has a volume of 212 billion US gallons (800,000,000 m3), and drains a watershed of 208 square miles (540 km2).