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DNR Lake
Division of Water
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DNR Contacts for Lake Wisconsin

Harmony Grove Lake District [exit DNR]

Lake Wisconsin Alliance

Village Of Merrimac [exit DNR]

Find A Lake > Sauk County > Lake Wisconsin

Lake Wisconsin


Facts & Figures
Name Lake Wisconsin
Waterbody ID (WBIC) 1260600
Area 7197 ACRES
Maximum Depth 24 feet
Waterbody Type flowage
Hydrologic Lake Type DRAINAGE
County Sauk, Columbia
Region SC
Latitude, Longitude 43.3710228, -89.6030917
Contour (Bathymetric) Map Contour Map
Interactive Map Interactive Map
Lake Management
Lake Organizations Harmony Grove Lake District [exit DNR]
Lake Wisconsin Alliance [exit DNR]
Village Of Merrimac [exit DNR]
Recreation
Boat Landings 15
Boating Ordinances ** slow-no-wake areas, buoy placement, lights, noise levels, right of way, ski jumps, water exhibitions and races, waterway markers - See Details
Fish Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Trout, Walleye and Catfish
Public Lands / Parks 1
Lake Health
Invasive Species *
 Curly-Leaf Pondweed, Eurasian Water-Milfoil, Zebra Mussel
Trophic Status Eutrophic

* About Invasive Species: Disclaimer: Aquatic invasive species (AIS) records are assigned statuses of "verified", "observed", or "no longer observed" based on AIS Status Guidance. In general, "verified" populations are established and have been verified by a taxonomic expert. Populations with the "observed" status have not been verified by a taxonomic expert or do not have established populations. Populations with the "no longer observed" status include populations where a reproducing population did not establish. Our inventories are not necessarily exhaustive so it is important to report occurrences. To report new discoveries visit: https://dnr.wisconsin.gov/topic/Invasives/report.html. See the Aquatic Invasive Species Guidance for information on how statuses are assigned. Personally identifiable information on data collection forms may be provided to requesters to the extent required by Wisconsin's Open Records Law [ss. 19.31-19.39, Wis. Stats.].

** About Boating Ordinances: Before boating on an unfamiliar Wisconsin waterways check for a sign at the public boat landing to determine if there are local regulations (more restrictive than state law) which may apply on that waterbody. Also be sure to review the document Wisconsin Boating Regulations to learn about statewide regulations. There may be a delay between the time an ordinance is passed and the time it gets into our database. Therefore, the only way to know for sure if a water body has an ordinance in effect is to look for a sign posted at a public boat landing.