Seneca Lake is a Finger Lake in central New York state. Spanning four counties - Schuyler, Seneca, Yates, and Ontario - it is the largest of the eleven lake glacial chain, and the deepest glacial lake entirely within the state.
Seneca Lake is 38 miles (61Â km) long, has a surface area of 66.9 square miles (173Â km), a maximum depth of over 618 feet (188Â m), and holds the most water of all the Finger Lakes (estimated at 3.81 cubic miles (15.9Â km), roughly half that of the entire chain).