Island Lake
About Island Lake
Island Lake is an 184-acre lake near Longville in Cass County, Minnesota. It reaches 40 feet at its deepest point, and has roughly 3.5 miles of shoreline. DNR surveys put average water clarity at about 18 feet, which is exceptionally clear for Minnesota.
Minnesota DNR fisheries surveys list 13 fish species here, including walleye, northern pike, largemouth bass, black crappie, bluegill, and pumpkinseed. The DNR has stocking records for the lake, so check the stocking report for the most recent species and year classes. Special fishing regulations apply to sunfish, and they override the statewide limits. The most recent fisheries survey on file dates to 2023.
There is one public boat launch (concrete surface) managed by the Minnesota DNR. Ice typically goes out around April 18, based on 23 years of DNR ice-out records.
Plan Your Visit to Island Lake
- 184 acres, up to 40 feet deep, near Longville
- 1 public boat launch (concrete) — managed by the Minnesota DNR
- Game fish on the DNR survey: walleye, northern pike, largemouth bass, black crappie, bluegill, and pumpkinseed
- Special fishing regulations apply here and override the statewide limits
- Average water clarity around 18 feet — very clear
Access & Fees
- Public access
- 1 public boat launch (concrete)
- Launch fee
- Free at DNR accesses
- Managed by
- Minnesota DNR
Conditions
- Surface area
- 184 acres
- Max depth
- 40 ft
- Shoreline
- 3.5 mi
- Water clarity
- 18 ft
- Shallows (under 15 ft)
- 100 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
- Walleye fishing
- Quiet paddling
- 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
- 13
- Game fish
- 8
- Stocked
- Yes
- Last DNR survey
- 2023
- Special regulations
- Yes
- Fishing pier
- No
- Ice fishing
- Yes
- Boat launch
- Yes
Special regulations on this lake
- Sunfish: Daily limit five.
Fishing data: Minnesota Department of Natural Resources. Regulations change — confirm with the current DNR fishing regulations.
Ice-Out History
- Median ice-out
- April 18
- Years of record
- 23
- Earliest
- April 1, 2016
- Latest
- May 5, 2022
- Most recent
- April 19, 2026
See every lake on the ice-out tracker. Ice-out data: Minnesota DNR State Climatology Office.
Activities
Amenities
Fish Species
Plan your trip to Island Lake
Compare Island Lake against the top-ranked lakes nearby, then map your route.
See how Island Lake ranks among fishing lakes nearby.
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See how Island Lake ranks among paddling lakes nearby.
See how Island Lake ranks among ice fishing lakes nearby.
Nearby Lakes
Sand Lake
64 out of 100 Lake ScoreCass · Hackensack149 acres
0.9 miles away
Sand Lake
40 out of 100 Lake ScoreCass · Longville41 acres
1.4 miles away
Long Lake
61 out of 100 Lake ScoreCass · Hackensack246 acres
1.4 miles away
Ponto Lake
66 out of 100 Lake ScoreCass · Backus388 acres
1.5 miles away
Blackwater Lake
66 out of 100 Lake ScoreCass · Longville771 acres
1.6 miles away
Widow Lake
64 out of 100 Lake ScoreCass · Longville198 acres
2 miles away
Frequently Asked Questions
Where is Island Lake?
Island Lake is in Cass County, Minnesota, near Longville. It covers 184 acres and reaches 40 feet deep.
How big and how deep is Island Lake?
Island Lake covers 184 acres with about 3.5 miles of shoreline. Its maximum depth is 40 feet.
What fish can you catch at Island Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Largemouth Bass, Black Crappie, Bluegill, Pumpkinseed, Yellow Perch, and Rock Bass and other species. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Island Lake?
Yes. Island Lake has 1 public boat launch (concrete), managed by the Minnesota DNR. DNR public water accesses are free to use.
Can you swim at Island Lake?
There is no mapped public swim beach at 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 Island Lake stocked?
Yes. The Minnesota DNR has stocking records for Island Lake; species and numbers vary by year, so see the stocking report on DNR LakeFinder.
Are there special fishing regulations on Island Lake?
Yes. Daily limit five.
When does the ice go out on Island Lake?
The median ice-out date is April 18, from 23 years of Minnesota DNR records. The earliest on record is April 1, 2016 and the latest is May 5, 2022.