Max. length 20 mi (32 km)
Max. width 0.5 to 2 mi (0.80 to 3.22 km)
Surface area 11,730 acres (47.5 km2)
Average depth 101 ft (31 m)
Max. depth 187 ft (57 m)
Shore length1 60 mi (97 km)
Surface elevation 715 ft (218 m) The Y-shaped Keuka Lake empties into another Finger Lake, Seneca Lake, through a stream called Keuka Lake Outlet at the lake’s northeastern end in Penn Yan. The stream empties into Seneca Lake at the village of Dresden. At one time the outlet was developed into a canal, the Crooked Lake Canal, connecting the lakes. This canal was later replaced by a railroad branch line which is now a hiking and cycling trail.
The lake is about 20 miles (32 km) long and varies in width from one-half mile (0.80 km) to two miles (3.2 km). It has a surface area of 11,730 acres (47.5 km2), and a maximum and mean depth of 186 feet (57 m) and 101 feet (31 m) respectively.
Its thermocline is between 30 and 35 feet (9.1 and 10.7 m) deep.