Lake Monona

Lake Monona
Lake with Monona Terrace and Madison skyline in the distance
Location	Dane County, Wisconsin
Coordinates	43°4′9″N 89°21′34″W / 43.06917°N 89.35944°W / 43.06917; -89.35944Coordinates: 43°4′9″N 89°21′34″W / 43.06917°N 89.35944°W / 43.06917; -89.35944
Primary inflows	Yahara River, Starkweather Creek, Murphy Creek
Basin countries	United States
Surface area	3,274 acres (13 km2)
Average depth	27 ft (8.2 m)
Max. depth	74 ft (23 m)
Residence time	1.1 years
Surface elevation	845 ft (258 m)
Frozen	About 107 days a year
Settlements	Madison, Monona

Lake Monona is a freshwater drainage lake in Dane County, Wisconsin, surrounded on three sides by the city of Madison, Wisconsin, and on the south side by the city of Monona, Wisconsin. It is the second-largest of a chain of four lakes along the Yahara River (also including Mendota, Kegonsa, and Waubesa) in the area and forms the south shore of the isthmus that forms downtown Madison. The name 'Monona' is a Chippewa word believed to mean 'beautiful', although the lake was originally named by the Ho-Chunk (Winnebago) 'Tchee-ho-bo-kee-xa-te-la' or 'Teepee Lake'.

Lake Monona rests at 43°4′9″N 89°21′34″W / 43.06917°N 89.35944°W / 43.06917; -89.35944. It measures 3,274 acres (13.2 km²), has a mean depth of 27 ft (8.3 m) and a maximum depth of 74 ft (22.6 m). Its volume is approximately 28 billion US gallons (110,000,000 m³) and it has 13 miles (21 km) of shoreline, about 40% of which is publicly owned. The elevation of the lake is 845', regulated by locks at the mouth of the Yahara River at Lake Mendota. Monona is fed by three tributaries; The Yahara River (from Lake Mendota), Starkweather Creek, and Wingra Creek. Lake Monona is typically frozen for 107 days a year, give or take 10 days depending on the season. Access to the lake is by boat ramp.