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Seneca Lake

Seneca Lake Map

Like most of the Finger Lakes, Seneca Lake is long, narrow and very deep.  It's the second longest, at 37.9 miles, and the deepest.  The maximum depth is 618 feet and the average depth is 291 feet.  The average width is 3 miles.

                                 

Another source for a chart of Seneca lake, with some depth contours is the New York State Department of Environmental Conservation.