US lakes & pondsUS lakes & pondsTwin Lakes · Carlton · Thomson, Minnesota — Carlton County.
Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 107075016).
The red circle marks Thomson Reservoir.
Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.
Official Minnesota 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 found in Minnesota DNR lake surveys: Black bullhead, Black crappie, Channel catfish, Northern pike, Rock bass, Shorthead redhorse, Smallmouth bass, Walleye, White sucker, Yellow perch.
Average depth not published.
Shallow (littoral) area: 283 of 390 acres
Source: Minnesota Department of Natural Resources LakeFinder record for Thomson Reservoir (DOW 09000100), with lake survey reports, depth maps and stocking history. Acreage here can differ slightly from our mapped outline.
No public access sites are listed for this water in the Minnesota DNR public water access sites (Minnesota Geospatial Commons) data.
Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 107075016), public domain. State outline: U.S. Census Bureau TIGERweb. Points: Minnesota DNR public water access sites (Minnesota Geospatial Commons). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.
We found 16 campgrounds and RV parks within 15 miles of Thomson Reservoir, 7 of them within 5 miles. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.
Electric hookups · Showers · Dump station · Drinking water
Tent sites · Toilets
Electric hookups · Dump station · Drinking water
All campgrounds & RV parks in Minnesota
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 (46.6712, -92.4078). The nearest station may be several miles away. NWS forecast for Thomson Reservoir. 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.
Thomson Reservoir covers about 342 acres in Twin Lakes, Carlton and Thomson, Minnesota (Carlton County).
The maximum recorded depth is 22 feet, according to the Minnesota DNR LakeFinder.
Minnesota DNR LakeFinder lists Walleye, Northern pike, Smallmouth bass, Black crappie, Yellow perch, Channel catfish, Rock bass, Black bullhead, Shorthead redhorse and White sucker.
Yes. We list 16 campgrounds and RV parks within 15 miles, 7 of them within 5 miles.
Thomson Reservoir touches Twin Lakes, Carlton and Thomson in Carlton County, Minnesota.
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Straight-line distance between lake centers. All Minnesota lakes & ponds · All waters in Twin Lakes