Viewed in the late afternoon from Cornell University
|Location||Cayuga / Seneca / Tompkins counties, New York, USA|
|Primary outflows||Seneca River|
|Catchment area||2,033 km2 (785 sq mi)|
|Basin countries||United States|
|Max. length||38 mi (61 km)|
|Max. width||3.5 mi (5.6 km)|
|Surface area||172 km2 (66 sq mi)|
|Average depth||182 ft (55 m)|
|Max. depth||435 ft (133 m)|
|Water volume||9.46 km3 (2.27 cu mi)|
|Residence time||18.2 years|
|Surface elevation||381.9 ft (116.4 m)|
|Islands||1 (Frontenac Island)|
Cayuga Lake (pron.: // or //) is the longest of central New York's glacial Finger Lakes, and is the second largest in surface area (marginally smaller than Seneca Lake) and second largest in volume. It is just under 40 miles (64 km) long. Its average width is 1.7 miles (2.7 km), and it is 3.5 mi wide (5.6 km) at its widest point near Aurora. It is approximately 435 ft deep (133 m) at its deepest point.
Villages and settlements along the east shore of Cayuga Lake include Myers, King Ferry, Aurora, Levanna, Union Springs, and Cayuga. Settlements along the west shore of the lake include Sheldrake, Poplar Beach, and Canoga.
The lake has one small island near Union Springs, Frontenac Island. It is one of only two islands in the Finger Lakes.
Geographical characteristics 
- Length: 61.4 km (38.2 mi)
- Average width: 2.8 km (1.7 mi)
- Maximum depth: 132 m (433 ft)
- Surface area: 172 km2 (66 sq mi)
- Mean depth: 54.5 m (179 ft)
- Catchment area: 2,033 km² (37.1% natural forest, 58% active agricultural)
- Main islands: 1, Frontenac
- Main outflows: 1
The water level is regulated by the Mud Lock at the north end of the lake. It is connected to Lake Ontario by the Erie Canal and Seneca Lake by the Seneca River. The lake is drawn down as winter approaches, to minimize ice damage and to maximize its capacity to store heavy spring runoff.
The southern end is also shallow and often freezes during the winter.
Human impact 
Cayuga Lake is very popular among recreational boaters. A large state marina and boat launch is located at the southern end of the lake in Ithaca (Allan H. Treman State Marine Park, the largest inland marina in New York). There are two yacht clubs on the western shore: Ithaca Yacht Club a few miles north of Ithaca, and Red Jacket Yacht Club just south of Canoga. There are several other marinas and boat launches scattered along the lake shore.
Cayuga Lake is the source of drinking water for several communities, including Lansing near the southern end of the lake along the east side, which draws water through the Bolton Point Municipal Water system. There are also several lake source cooling systems that are in operation on the lake, whereby cooler water is pumped from the depths of the lake, warmed, and circulated in a closed system back to the surface. One of these systems, which is operated by Cornell University and began operation in 2000, was controversial during the planning and building states for potential negative environmental impact. All the environmental impact reports and scientific studies have shown that the Cornell lake source cooling system has not yet had and will not likely have any measurably significant environmental impact. Furthermore, Cornell's system pumps significantly less warm water back into the lake than others further north which have been operating for decades, including the coal-fired power plant on the eastern shore.
The AES Cayuga electrical generating station operates in the Town of Lansing, on the east shore of Cayuga Lake. This coal-fired plant uses Cayuga Lake as a cooling source. In the late 1960s, citizens successfully opposed the construction of an 830-MW nuclear power plant on the shore of Cayuga Lake.
A tradition at Wells College in Aurora holds that if the lake completely freezes over, classes are canceled (though for only one day). According to Wells College records, this last happened in 1979. However, other sources suggest that the only time the entire lake froze over solid end to end in the 20th century was in 1912., and that with global warming it is unlikely for this to ever happen again.
Cayuga Lake, like nearby Seneca Lake, is also the site of a phenomenon known as the Guns of the Seneca, mysterious cannon-like booms heard in the surrounding area. Many of these booms may be attributable to bird-scarers, automated cannon-like devices used by farmers to scare birds away from the many vineyards, orchards and crops. There is however no proof of this.
Cayuga Lake is included in the American Viticultural Area with which it shares its name. Established in 1988, the AVA now boasts over a dozen wineries, four distilleries, a cidery, and a meadery.
See also 
- "The Role of Experts in a Nuclear Siting Controversy"
- Chain Reaction pp. 262-264.
- Wolfgang Rudig (1990). Anti-nuclear Movements: A World Survey of Opposition to Nuclear Energy, Longman, pp. 126-127.
- Jim Falk (1982). Global Fission: The Battle Over Nuclear Power, Oxford University Press, p. 94.
- The Student Life Office (2007). "Wells College Student Traditions". Wells College (Official Site). Wells College. Retrieved 2008-01-16.
- New York Times February 19, 1912 CORNELL SKATERS DROWN page 1
- Anthony Ingraham, "Does Cayuga Lake Freeze Over?", February 13, 2013.
- Code of Federal Regulations. "§ 9.127 Cayuga Lake." Title 27: Alcohol, Tobacco and Firearms; Part 9 — American Viticultural Areas; Subpart C — Approved American Viticultural Areas. Retrieved Feb. 6, 2008.
- "Wineries". Cayuga Lake Wine Trail. Retrieved 26 June 2011.
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