Cayuga Lake, at about 381 feet above sea level (the surface elevation varies a little with precipitation in the watershed and output at the northern end) is lower than all other ten Finger Lakes. In fact, Cayuga Lake receives water from Keuka Lake which drains downhill into Seneca Lake, which in turn pours down to Cayuga via the Seneca River/Cayuga-Seneca Canal. Cayuga's water then slides slowly downhill through the Seneca and Oswego Rivers to Lake Ontario, the lowest of the Great Lakes at 242 feet above sea level.
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