Flat Horn Lake
About Flat Horn Lake
Flat Horn Lake is a 52-acre lake near Isabella in Lake County, Minnesota. It reaches 13 feet at its deepest point, and has roughly 2 miles of shoreline. DNR surveys put average water clarity at about 6 feet.
Minnesota DNR fisheries surveys list 9 fish species here, including walleye, northern pike, largemouth bass, black crappie, bluegill, and pumpkinseed. The most recent fisheries survey on file dates to 2024.
Public access is carry-in only — plan on a canoe, kayak or small boat you can hand-launch.
Plan Your Visit to Flat Horn Lake
- 52 acres, up to 13 feet deep, near Isabella
- Carry-in access only — bring a boat you can hand-launch unless you confirm a ramp
- Game fish on the DNR survey: walleye, northern pike, largemouth bass, black crappie, bluegill, and pumpkinseed
- Average water clarity around 6 feet
Access & Fees
- Public access
- Carry-in access only
- Launch fee
- Free at DNR accesses
- Managed by
- US Forest Service
Conditions
- Surface area
- 52 acres
- Max depth
- 13 ft
- Shoreline
- 2 mi
- Water clarity
- 6 ft
- Shallows (under 15 ft)
- 52 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 carry-in access
- Picnic area
Best For
- Ice fishing
- Ice is never completely safe — check thickness yourself before walking or driving on any lake
Angler's Report
Minnesota DNR LakeFinder- Species on survey
- 9
- Game fish
- 8
- Stocked
- No
- Last DNR survey
- 2024
- Special regulations
- No
- Fishing pier
- No
- Ice fishing
- Yes
- Boat launch
- No
Fishing data: Minnesota Department of Natural Resources. Regulations change — confirm with the current DNR fishing regulations.
Activities
Amenities
Fish Species
Plan your trip to Flat Horn Lake
Compare Flat Horn Lake against the top-ranked lakes nearby, then map your route.
Nearby Lakes
Gegoka Lake
48 out of 100 Lake ScoreLake · Isabella145 acres
0.9 miles away
Mitawan Lake
28 out of 100 Lake ScoreLake · Isabella191 acres
1.7 miles away
Grouse Lake
40 out of 100 Lake ScoreLake · Isabella119 acres
1.9 miles away
Gander Lake
17 out of 100 Lake ScoreLake · Isabella117 acres
3 miles away
Inga Lake
25 out of 100 Lake ScoreLake · Kelly Landing41 acres
3.2 miles away
Dragon Lake
40 out of 100 Lake ScoreLake · Isabella79 acres
3.5 miles away
Frequently Asked Questions
Where is Flat Horn Lake?
Flat Horn Lake is in Lake County, Minnesota, near Isabella. It covers 52 acres and reaches 13 feet deep.
How big and how deep is Flat Horn Lake?
Flat Horn Lake covers 52 acres with about 2 miles of shoreline. Its maximum depth is 13 feet.
What fish can you catch at Flat Horn Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Largemouth Bass, Black Crappie, Bluegill, Pumpkinseed, Yellow Perch, and Rock Bass. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Flat Horn Lake?
Public access is on record, but not a trailer ramp: carry-in access only.
Can you swim at Flat Horn Lake?
There is no mapped public swim beach at Flat Horn 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 Flat Horn Lake stocked?
The DNR has no stocking report on file for Flat Horn Lake; its fishery is sustained by natural reproduction or has not been stocked recently.