Conesus Lake is the most westerly of the Finger Lakes. It is located in Livingston County, 2 miles west of Livonia, about 8 miles east of Geneseo and approximately 25 miles south of Rochester. The length is 8 miles with a maximum width of 1 mile and maximum depth of 66 feet.

The four townships that make up Conesus Lake are Livonia and Conesus on the east side and Geneseo and Groveland on the west side.

Conesus Lake was one of the first lakes in New York State to have a perimeter sewer, which was in 1972 with 26 pumping stations and a processing treatment plant at the north end. Currently there is public water that surrounds the lake. Conesus is also a source of drinking water for nearby towns and villages. Conesus Lake has over 1000 homes around the lake which all enjoy the summer activities of boating, skiing, and great fishing. Walleye, Northern Pike, Perch and Bass are some of the fantastic sport fish. Winter activities also include ice fishing, ice skating, and ice boating. Normally the lake does completely freeze over.

On Conesus Lake there are two parks, one in Livonia - Vitale Park at Sand Point and the other in Geneseo at Long Point. Both have beautiful picnic areas. The lake also has a public boat launch on East Lake Road just south of Mc Pherson Point and the general store.

There are two boat marinas on East Lake Road, Mark's Leasure Time Marina and Smith Boys Jansen Marina of Conesus Lake. Southern Shores Campground is on the east side in the Town of Conesus. Also on the south end of East Lake Road is the Conesus Inn (well known for its truman cut of prime rib). There's even a grass strip airport off West Lake Road at the north end.