Little Boy Lake
About Little Boy Lake
Little Boy Lake is a 1,452-acre lake near Longville in Cass County, Minnesota. It reaches 74 feet at its deepest point, and has roughly 10 miles of shoreline. DNR surveys put average water clarity at about 12.7 feet, clearer than most lakes in the state.
Minnesota DNR fisheries surveys list 17 fish species here, including walleye, northern pike, muskellunge, largemouth bass, smallmouth bass, and black crappie. 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 northern pike and walleye, and they override the statewide limits. The most recent fisheries survey on file dates to 2024.
There is one public boat launch (concrete surface) managed by the Minnesota DNR. OpenStreetMap shows a swim beach on or beside the lake. The lake is listed as infested with zebra mussel — clean, drain and dry your boat and gear before leaving. Ice typically goes out around April 21, based on 24 years of DNR ice-out records.
Plan Your Visit to Little Boy Lake
- 1,452 acres, up to 74 feet deep, near Longville
- 1 public boat launch (concrete) — managed by the Minnesota DNR
- Game fish on the DNR survey: walleye, northern pike, muskellunge, largemouth bass, smallmouth bass, and black crappie
- Special fishing regulations apply here and override the statewide limits
- Average water clarity around 12.7 feet — very clear
- Swim beach on or beside the lake
- Listed as infested with zebra mussel — clean, drain and dry before you leave
Access & Fees
- Public access
- 1 public boat launch (concrete)
- Launch fee
- Free at DNR accesses
- Managed by
- Minnesota DNR
Conditions
- Surface area
- 1,452 acres
- Max depth
- 74 ft
- Shoreline
- 10 mi
- Water clarity
- 12.7 ft
- Shallows (under 15 ft)
- 466 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)
- Swim beach
Best For
- Walleye fishing
- Swimming and beach days
- 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
- 17
- Game fish
- 11
- Stocked
- Yes
- Last DNR survey
- 2024
- Special regulations
- Yes
- Fishing pier
- No
- Ice fishing
- Yes
- Boat launch
- Yes
Special regulations on this lake
- Northern Pike: All from 24-36" must be immediately released. Possession limit three, only one over 36".
- Walleye: All from 18-26" must be immediately released. One over 26" allowed in possession. Possession limit four.
Fishing data: Minnesota Department of Natural Resources. Regulations change — confirm with the current DNR fishing regulations.
Ice-Out History
- Median ice-out
- April 21
- Years of record
- 24
- Earliest
- March 27, 2012
- Latest
- May 13, 2013
- Most recent
- April 21, 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 Little Boy Lake
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Nearby Lakes
Cooper Lake
31 out of 100 Lake ScoreCass · Longville133 acres
1.7 miles away
Rice Lake
45 out of 100 Lake ScoreCass · Inguadona270 acres
1.9 miles away
Hunter Lake
12 out of 100 Lake ScoreCass · Wabedo182 acres
2.1 miles away
Lake Wabedo
74 out of 100 Lake ScoreCass · Longville1,226 acres
2.7 miles away
Girl Lake
65 out of 100 Lake ScoreCass · Longville428 acres
3.5 miles away
Inguadona Lake
64 out of 100 Lake ScoreCass · Longville1,133 acres
3.6 miles away
Frequently Asked Questions
Where is Little Boy Lake?
Little Boy Lake is in Cass County, Minnesota, near Longville. It covers 1,452 acres and reaches 74 feet deep.
How big and how deep is Little Boy Lake?
Little Boy Lake covers 1,452 acres with about 10 miles of shoreline. Its maximum depth is 74 feet.
What fish can you catch at Little Boy Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Muskellunge, Largemouth Bass, Smallmouth Bass, Black Crappie, Bluegill, Pumpkinseed, and Yellow Perch and other species. A Minnesota fishing license is required for anyone 16 and older.
Is there a public boat launch on Little Boy Lake?
Yes. Little Boy Lake has 1 public boat launch (concrete), managed by the Minnesota DNR. DNR public water accesses are free to use.
Can you swim at Little Boy Lake?
Yes. A swim beach is mapped on or beside the lake. Most Minnesota beaches have no lifeguard, so swim at your own risk and check for beach advisories.
Is Little Boy Lake stocked?
Yes. The Minnesota DNR has stocking records for Little Boy Lake; species and numbers vary by year, so see the stocking report on DNR LakeFinder.
Are there special fishing regulations on Little Boy Lake?
Yes. All from 24-36" must be immediately released. Possession limit three, only one over 36". All from 18-26" must be immediately released. One over 26" allowed in possession. Possession limit four.
When does the ice go out on Little Boy Lake?
The median ice-out date is April 21, from 24 years of Minnesota DNR records. The earliest on record is March 27, 2012 and the latest is May 13, 2013.
Does Little Boy Lake have invasive species?
Yes. The DNR lists Little Boy Lake as infested with zebra mussel. State law requires you to clean off plants, pull the drain plug and drain all water before leaving the access.