Lannon Lake
About Lannon Lake
Lannon Lake is a 197-acre lake near Graceville in Big Stone County, Minnesota. It reaches 4 feet at its deepest point, and has roughly 3.9 miles of shoreline. DNR surveys put average water clarity at about 1 feet, so expect stained or algae-tinted water in summer.
Minnesota DNR fisheries surveys list 13 fish species here, including walleye, northern pike, black crappie, white crappie, and yellow perch. The DNR has stocking records for the lake, so check the stocking report for the most recent species and year classes. The most recent fisheries survey on file dates to 2024.
There is one public boat launch (gravel or earth surface).
Plan Your Visit to Lannon Lake
- 197 acres, up to 4 feet deep, near Graceville
- 1 public boat launch (gravel or earth)
- Game fish on the DNR survey: walleye, northern pike, black crappie, white crappie, and yellow perch
- Average water clarity around 1 feet — expect green or stained water by midsummer
Access & Fees
- Public access
- 1 public boat launch (gravel or earth)
- Launch fee
- Free at DNR accesses
Conditions
- Surface area
- 197 acres
- Max depth
- 4 ft
- Shoreline
- 3.9 mi
- Water clarity
- 1 ft
- Shallows (under 15 ft)
- 197 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
- 1 public boat launch (gravel or earth)
Best For
- Ice fishing
- 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
- 13
- Game fish
- 5
- Stocked
- Yes
- Last DNR survey
- 2024
- 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 Lannon Lake
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Nearby Lakes
East Toqua Lake
49 out of 100 Lake ScoreBig Stone · Graceville437 acres
0.9 miles away
North Rothwell Lake
38 out of 100 Lake ScoreBig Stone · Clinton297 acres
3 miles away
Eli Lake
30 out of 100 Lake ScoreBig Stone · Clinton162 acres
6.2 miles away
Barry Lake
30 out of 100 Lake ScoreBig Stone · Barry398 acres
7.5 miles away
Swenson Lake
40 out of 100 Lake ScoreBig Stone · Clinton204 acres
10.3 miles away
Big Stone Lake
77 out of 100 Lake ScoreBig Stone · Ortonville11,984 acres
12.9 miles away
Frequently Asked Questions
Where is Lannon Lake?
Lannon Lake is in Big Stone County, Minnesota, near Graceville. It covers 197 acres and reaches 4 feet deep.
How big and how deep is Lannon Lake?
Lannon Lake covers 197 acres with about 3.9 miles of shoreline. Its maximum depth is 4 feet.
What fish can you catch at Lannon Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Black Crappie, White Crappie, and Yellow Perch and other species. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Lannon Lake?
Yes. Lannon Lake has 1 public boat launch (gravel or earth). DNR public water accesses are free to use.
Can you swim at Lannon Lake?
There is no mapped public swim beach at Lannon 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 Lannon Lake stocked?
Yes. The Minnesota DNR has stocking records for Lannon Lake; species and numbers vary by year, so see the stocking report on DNR LakeFinder.