About Seneca Lake

Seneca Lake was carved out of bedrock over 10,000 years ago by glaciers, it is the deepest freshwater lake east of the Mississippi River outside of the Great Lakes. The lake’s shoreline is found within Seneca, Ontario, Yates and Schuyler Counties.

Seneca Lake

Interesting Facts:

38 miles long

3.2 miles at greatest width, 1.9 miles average

633 feet deep, at maximum

66.3 square miles or about 42,400 acres

4.2 Trillion gallons of water

75 miles of shoreline

11 municipalities rely on the lake for public water systems

100,000 (approximately) residents use Seneca Lake as their primary water source