US lakes & pondsUS lakes & pondsSurface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 69577958).
The red circle marks Rock Dam Lake.
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): Panfish (present), Largemouth Bass (present).
Average depth not published.
DNR lake class: Simple - Riverine
Source: Wisconsin Department of Natural Resources Lake Page for Rock Dam Lake (WBIC 2139000); 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 69577958), public domain. State outline: U.S. Census Bureau TIGERweb. Points: Wisconsin DNR boat access sites. Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.
We found 2 campgrounds and RV parks within 15 miles of Rock Dam Lake. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.
Electric hookups · RVs welcome · Tent sites · Showers
Electric hookups · Drinking water
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 (44.7281, -90.8427). The nearest station may be several miles away. NWS forecast for Rock Dam Lake. 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.
1 public access site listed, 1 with a boat ramp or trailer launch.
| Site | Town | Owner | Type | Parking | Fee | Uses | Map |
|---|---|---|---|---|---|---|---|
| Rock Dam County Park Boat Ramp | Foster | Clark County Forestry & Parks | Boat ramp · Concrete Panels ramp | — | — | Boating Handicap accessible | 44.7315, -90.8471 |
Wisconsin DNR boat access sites
Fees, hours and rules change; confirm with the site owner before you go.
On OpenStreetMap: 1 beach or swimming spot on the shore of Rock Dam Lake not marked private, residents-only or members-only.
| Beach | Type | Access | Directions |
|---|---|---|---|
| Rock Dam 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.
Rock Dam Lake covers about 96 acres in Foster, Wisconsin (Clark County).
The maximum recorded depth is 10 feet, according to the Wisconsin DNR Lake Pages.
Wisconsin DNR Lake Pages lists Largemouth Bass and Panfish.
Yes. 1 public trailer launch is listed: Rock Dam County Park Boat Ramp. 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 2 campgrounds and RV parks within 15 miles.
Rock Dam Lake touches Foster in Clark County, Wisconsin.
Know Rock Dam Lake? 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 Foster