Three Island Lake
About Three Island Lake
Three Island Lake is a 288-acre lake near Longville in Cass County, Minnesota. It reaches 13 feet at its deepest point, and has roughly 7.5 miles of shoreline. DNR surveys put average water clarity at about 10.3 feet, clearer than most lakes in the state.
Minnesota DNR fisheries surveys list 8 fish species here, including northern pike, largemouth bass, black crappie, bluegill, pumpkinseed, and yellow perch. The most recent fisheries survey on file dates to 2022.
There is one public boat launch (concrete surface) managed by the US Forest Service.
Plan Your Visit to Three Island Lake
- 288 acres, up to 13 feet deep, near Longville
- 1 public boat launch (concrete) — managed by the US Forest Service
- Game fish on the DNR survey: northern pike, largemouth bass, black crappie, bluegill, pumpkinseed, and yellow perch
- Average water clarity around 10.3 feet
Access & Fees
- Public access
- 1 public boat launch (concrete)
- Launch fee
- Free at DNR accesses
- Managed by
- US Forest Service
Conditions
- Surface area
- 288 acres
- Max depth
- 13 ft
- Shoreline
- 7.5 mi
- Water clarity
- 10.3 ft
- Shallows (under 15 ft)
- 288 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 (concrete)
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
- 8
- Game fish
- 6
- Stocked
- No
- Last DNR survey
- 2022
- 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 Three Island Lake
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Nearby Lakes
Silver Lake
58 out of 100 Lake ScoreCass · Longville121 acres
2.3 miles away
Cedar Lake
51 out of 100 Lake ScoreCass · Whipholt135 acres
2.4 miles away
Horseshoe Lake
26 out of 100 Lake ScoreCass · Whipolt127 acres
2.9 miles away
Town Line Lake
54 out of 100 Lake ScoreCass · Longville698 acres
3.8 miles away
Kego Lake
26 out of 100 Lake ScoreCass · Longville121 acres
3.9 miles away
Girl Lake
65 out of 100 Lake ScoreCass · Longville428 acres
4.3 miles away
Frequently Asked Questions
Where is Three Island Lake?
Three Island Lake is in Cass County, Minnesota, near Longville. It covers 288 acres and reaches 13 feet deep.
How big and how deep is Three Island Lake?
Three Island Lake covers 288 acres with about 7.5 miles of shoreline. Its maximum depth is 13 feet.
What fish can you catch at Three Island Lake?
Minnesota DNR surveys list Northern Pike, Largemouth Bass, Black Crappie, Bluegill, Pumpkinseed, and Yellow Perch. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Three Island Lake?
Yes. Three Island Lake has 1 public boat launch (concrete), managed by the US Forest Service. DNR public water accesses are free to use.
Can you swim at Three Island Lake?
There is no mapped public swim beach at Three Island 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 Three Island Lake stocked?
The DNR has no stocking report on file for Three Island Lake; its fishery is sustained by natural reproduction or has not been stocked recently.