Historical evidence and sightings of a serpent/creature living in Seneca Lake, N.Y. Seneca lake which runs north & south between Geneva & Watkins Glen, New York. The lake is approximatley 37.9 miles long, 1.86 miles wide and reported to be approxmatly 618 feet deep. Was once thought of as bottomless, if one was to consider it is fed by underwater springs. The lake also is possibly connected underground by tunnels to Cayuga Lake. One of a kind beautiful pictures of Seneca lake.