US lakes & pondsUS lakes & pondsWest Point · Dekorra · Lodi · Merrimac · Caledonia · Prairie du Sac, Wisconsin — Columbia County.
Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 141288146).
The red circle marks Lake Wisconsin.
Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.
Official Wisconsin DNR pages. Rules and fees change; check before you go.
Built only from the data on this page: official access lists, OpenStreetMap beaches and trails, campground listings, state and USGS invasive-species records. We don't rate crowds or water quality.
Fish species listed by the Wisconsin DNR (with DNR abundance rating): Largemouth Bass (common), Smallmouth Bass (common), Northern Pike (common), Walleye (common), Panfish (present), Trout (present), Catfish (present).
Average depth not published.
DNR lake class: Complex - Riverine
Source: Wisconsin Department of Natural Resources Lake Page for Lake Wisconsin (WBIC 1260600); maximum depth and acreage from the DNR lake classification data. Acreage here can differ slightly from our mapped outline.
Numbers on the map match the list at rightbelow.
Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 141288146), public domain. State outline: U.S. Census Bureau TIGERweb. Points: Wisconsin DNR boat access sites and OpenStreetMap boat ramps (ODbL). Dashed trails: © OpenStreetMap contributors (ODbL). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.
OpenStreetMap shows about 2.2 mi of public hiking and walking trail within about 100 m (330 ft) of the Lake Wisconsin shoreline, mostly along the west shore.
No trailhead is mapped for these trails. The closest public access site is Pine Bluff Access, 300 ft from a shoreline trail (Wisconsin DNR boat access data).
The dashed brown line on the lake map shows these trails. We include paths, footways and marked trails that OpenStreetMap doesn't mark as private, and leave out roads, sidewalks and snowmobile corridors. Mapped trails can still cross private land or close for the season, and not every trail is mapped, so follow posted signs.
Trails: © OpenStreetMap contributors, available under the Open Database License (ODbL). Map data as of Oct 9, 2026. Trail lengths count only the parts within about 100 m of the USGS NHD lake outline.
We found 27 campgrounds and RV parks within 15 miles of Lake Wisconsin, 11 of them within 5 miles. 1 is right on the shore. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.
Electric hookups · RVs welcome · Tent sites · Dump station
RVs welcome
All campgrounds & RV parks in Wisconsin
Green tent icons on the lake map mark campgrounds near the shore, and the interactive map shows the closest 12. Amenities are listed only where a source records them; call or check the campground's website before you go, since seasons and rates change every year.
Campground data: OpenStreetMap contributors (ODbL). Pulled Oct 12, 2026.
Live from the National Weather Service API for the lake's coordinates (43.3571, -89.6374). The nearest station may be several miles away. NWS forecast for Lake Wisconsin. No live water-temperature sensor is shown because we haven't found a public one for this lake.
Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in CT (America/Chicago), and accurate to within a few minutes.
18 public access sites listed, 18 with a boat ramp or trailer launch.
| Site | Town | Owner | Type | Parking | Fee | Uses | Map |
|---|---|---|---|---|---|---|---|
| Boat ramp | Merrimac | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 43.3277, -89.7175 |
| Boat ramp | Merrimac | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 43.3596, -89.6874 |
| County Park Boat Launch | Merrimac | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 43.3507, -89.6922 |
| Eagle Drive Boat Launch | West Point | Town of Lodi | Boat ramp · Concrete Panels ramp | — | — | Boating | 43.3684, -89.5420 |
| Harmony Drive W. Boat Launch | West Point | Town of Lodi | Boat ramp · Concrete Plank ramp | — | — | Boating | 43.3712, -89.5478 |
| Lake Wisconsin | West Point | Town of Dekorra | Boat ramp · Concrete Panels ramp | — | — | Boating | 43.3993, -89.5425 |
| Lake Wisconsin | West Point | Town of Lodi | Boat ramp · Concrete Plank ramp | — | — | Boating | 43.3540, -89.5629 |
| Lake Wisconsin Access Corning St. Boat Launch | West Point | Town of Dekorra | Boat ramp · Concrete ramp | — | — | Boating | 43.3843, -89.5451 |
| Lake Wisconsin Boat Access - Moon Valley Access | West Point | Property Manager | Boat ramp · Concrete ramp | — | — | Boating Handicap accessible | 43.3723, -89.6695 |
| Lake Wisconsin Boat Access - Okee Access | West Point | Property Manager | Boat ramp · Concrete Panels ramp | — | — | Boating | 43.3578, -89.5824 |
| Lake Wisconsin Boat Access - Sunset Bay Landing | West Point | Property Manager | Boat ramp · Concrete Panels ramp | — | — | Boating | 43.3521, -89.6314 |
| Lakeside Boat Launch | Dekorra | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 43.3868, -89.5452 |
| Pine Bluff Access | West Point | Town of Lodi | Boat ramp · Concrete Panels ramp | — | — | Boating | 43.3673, -89.5686 |
| Summer Oak Cove Landing | West Point | Parks & Recreation Department | Boat ramp · Concrete ramp | — | — | Boating | 43.3494, -89.6935 |
| West Point Public Boat Landing | West Point | Town of West Point | Boat ramp · Concrete ramp | — | — | Boating | 43.3572, -89.6545 |
| West Point Public Boat Landing | West Point | Town of West Point | Boat ramp · Concrete Plank ramp | — | — | Boating | 43.3589, -89.6316 |
| Whalen Grade Landing | West Point | Property Manager | Boat ramp · Concrete Panels ramp | — | — | Boating | 43.3916, -89.5220 |
| Wisconsin River Access | West Point | Village of Merrimac | Boat ramp · Paved ramp | — | — | Boating | 43.3719, -89.6289 |
Wisconsin DNR boat access sites and OpenStreetMap boat ramps (ODbL)
Fees, hours and rules change; confirm with the site owner before you go.
On OpenStreetMap: 1 beach or swimming spot on the shore of Lake Wisconsin not marked private, residents-only or members-only.
| Beach | Type | Access | Directions |
|---|---|---|---|
| Okee Beach | Beach | Access not tagged; check posted rules | Get directions |
Beaches: © OpenStreetMap contributors (ODbL), within about 150 m (500 ft) of the lake outline. A mapped beach is not a guarantee that swimming is allowed, supervised or safe; some town beaches need a resident sticker even when the map doesn't say so. Check posted rules and water-quality advisories before you swim.
Reported on or near Lake Wisconsin
USGS Nonindigenous Aquatic Species database
USGS records matched to this water by location (within about 150 m of the outline) or by the place name in the record. A record shows a sighting was reported; it doesn't prove the species is still there. As of Oct 10, 2026.
Lake Wisconsin covers about 7,203 acres in West Point, Dekorra, Lodi and Merrimac, Wisconsin (Columbia County).
The maximum recorded depth is 24 feet, according to the Wisconsin DNR Lake Pages.
Wisconsin DNR Lake Pages lists Walleye, Northern Pike, Largemouth Bass, Smallmouth Bass, Panfish, Trout and Catfish.
Yes. 18 public trailer launches are listed: Whalen Grade Landing, West Point Public Boat Landing and Lake Wisconsin Access Corning St. Boat Launch. Check posted fees and parking rules.
OpenStreetMap shows 1 public beach or swimming spot on the shore. None of our sources lists a lifeguard, so swim at your own risk and follow posted rules.
Yes. We list 27 campgrounds and RV parks within 15 miles, 11 of them within 5 miles.
Lake Wisconsin touches West Point, Dekorra, Lodi, Merrimac, Caledonia and Prairie du Sac in Columbia County and Sauk County, Wisconsin.
Know Lake Wisconsin? Tell us about the launch, parking, where they're biting or anything a first-time visitor should know. Tips go privately to the LakeRipple editor; nothing is posted automatically. Helpful tips may be featured on this page (we'll use your first name only if you give one).
Straight-line distance between lake centers. All Wisconsin lakes & ponds · All waters in West Point