Thompson Lake
About Thompson Lake
Thompson Lake is a 226-acre lake near Cosmos in Meeker County, Minnesota. It reaches 8 feet at its deepest point, and has roughly 2.9 miles of shoreline. DNR surveys put average water clarity at about 1.5 feet, so expect stained or algae-tinted water in summer.
Minnesota DNR fisheries surveys list 3 fish species here, including yellow perch. The most recent fisheries survey on file dates to 2013.
There are 2 public boat launches (concrete surface) managed by the county and Minnesota DNR.
Plan Your Visit to Thompson Lake
- 226 acres, up to 8 feet deep, near Cosmos
- 2 public boat launches (concrete) — managed by the county and Minnesota DNR
- Game fish on the DNR survey: yellow perch
- Average water clarity around 1.5 feet — expect green or stained water by midsummer
Access & Fees
- Public access
- 2 public boat launches (concrete)
- Launch fee
- Free at DNR accesses
- Managed by
- county, Minnesota DNR
Conditions
- Surface area
- 226 acres
- Max depth
- 8 ft
- Shoreline
- 2.9 mi
- Water clarity
- 1.5 ft
- Shallows (under 15 ft)
- 226 acres
Rules & Regulations
- A Minnesota fishing license is required for anglers 16 and older
- Drain plugs must be out and all water drained before leaving any access; remove aquatic plants from boats and trailers
- Children under 10 must wear a life jacket on a boat that is underway
Facilities
- 2 public boat launches (concrete)
- Low-clarity lakes are prone to summer algae blooms; keep dogs out of green, scummy water
- Ice is never completely safe — check thickness yourself before walking or driving on any lake
Angler's Report
Minnesota DNR LakeFinder- Species on survey
- 3
- Game fish
- 1
- Stocked
- No
- Last DNR survey
- 2013
- Special regulations
- No
- Fishing pier
- No
- Ice fishing
- Yes
- Boat launch
- Yes
Fishing data: Minnesota Department of Natural Resources. Regulations change — confirm with the current DNR fishing regulations.
Activities
Amenities
Fish Species
Plan your trip to Thompson Lake
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Carrie Lake
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Frequently Asked Questions
Where is Thompson Lake?
Thompson Lake is in Meeker County, Minnesota, near Cosmos. It covers 226 acres and reaches 8 feet deep.
How big and how deep is Thompson Lake?
Thompson Lake covers 226 acres with about 2.9 miles of shoreline. Its maximum depth is 8 feet.
What fish can you catch at Thompson Lake?
Minnesota DNR surveys list Yellow Perch. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Thompson Lake?
Yes. Thompson Lake has 2 public boat launches (concrete), managed by the county and Minnesota DNR. DNR public water accesses are free to use.
Can you swim at Thompson Lake?
There is no mapped public swim beach at Thompson Lake. Minnesota's public waters are open to swimming where you have legal access, but there are no lifeguards or water-quality monitoring away from designated beaches.
Is Thompson Lake stocked?
The DNR has no stocking report on file for Thompson Lake; its fishery is sustained by natural reproduction or has not been stocked recently.