Mule Lake
About Mule Lake
Mule Lake is a 525-acre lake near Longville in Cass County, Minnesota. It reaches 47 feet at its deepest point, and has roughly 7.3 miles of shoreline. DNR surveys put average water clarity at about 18.4 feet, which is exceptionally clear for Minnesota.
Minnesota DNR fisheries surveys list 11 fish species here, including walleye, northern pike, largemouth bass, smallmouth bass, black crappie, and bluegill. 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 walleye, and they override the statewide limits. The most recent fisheries survey on file dates to 2023.
There are 2 public boat launches (asphalt surface) managed by the Minnesota DNR. Ice typically goes out around April 19, based on 10 years of DNR ice-out records.
Plan Your Visit to Mule Lake
- 525 acres, up to 47 feet deep, near Longville
- 2 public boat launches (asphalt) — managed by the Minnesota DNR
- Game fish on the DNR survey: walleye, northern pike, largemouth bass, smallmouth bass, black crappie, and bluegill
- Special fishing regulations apply here and override the statewide limits
- Average water clarity around 18.4 feet — very clear
Access & Fees
- Public access
- 2 public boat launches (asphalt)
- Launch fee
- Free at DNR accesses
- Managed by
- Minnesota DNR
Conditions
- Surface area
- 525 acres
- Max depth
- 47 ft
- Shoreline
- 7.3 mi
- Water clarity
- 18.4 ft
- Shallows (under 15 ft)
- 182 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
- 2 public boat launches (asphalt)
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
- 11
- Game fish
- 9
- Stocked
- Yes
- Last DNR survey
- 2023
- Special regulations
- Yes
- Fishing pier
- No
- Ice fishing
- Yes
- Boat launch
- Yes
Special regulations on this lake
- Walleye: Possession limit three.
Fishing data: Minnesota Department of Natural Resources. Regulations change — confirm with the current DNR fishing regulations.
Ice-Out History
- Median ice-out
- April 19
- Years of record
- 10
- Earliest
- April 5, 2017
- Latest
- May 7, 2022
- Most recent
- May 7, 2022
See every lake on the ice-out tracker. Ice-out data: Minnesota DNR State Climatology Office.
Activities
Amenities
Fish Species
Plan your trip to Mule Lake
Compare Mule Lake against the top-ranked lakes nearby, then map your route.
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Nearby Lakes
Blackwater Lake
66 out of 100 Lake ScoreCass · Longville771 acres
1.9 miles away
Hunter Lake
12 out of 100 Lake ScoreCass · Wabedo182 acres
1.9 miles away
Lake Wabedo
74 out of 100 Lake ScoreCass · Longville1,226 acres
2.1 miles away
Hay Lake
64 out of 100 Lake ScoreCass · Backus364 acres
3 miles away
Island Lake
63 out of 100 Lake ScoreCass · Longville184 acres
3.2 miles away
Widow Lake
64 out of 100 Lake ScoreCass · Longville198 acres
3.3 miles away
Frequently Asked Questions
Where is Mule Lake?
Mule Lake is in Cass County, Minnesota, near Longville. It covers 525 acres and reaches 47 feet deep.
How big and how deep is Mule Lake?
Mule Lake covers 525 acres with about 7.3 miles of shoreline. Its maximum depth is 47 feet.
What fish can you catch at Mule Lake?
Minnesota DNR surveys list Walleye, Northern Pike, Largemouth Bass, Smallmouth 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 Mule Lake?
Yes. Mule Lake has 2 public boat launches (asphalt), managed by the Minnesota DNR. DNR public water accesses are free to use.
Can you swim at Mule Lake?
There is no mapped public swim beach at Mule 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 Mule Lake stocked?
Yes. The Minnesota DNR has stocking records for Mule Lake; species and numbers vary by year, so see the stocking report on DNR LakeFinder.
Are there special fishing regulations on Mule Lake?
Yes. Possession limit three.
When does the ice go out on Mule Lake?
The median ice-out date is April 19, from 10 years of Minnesota DNR records. The earliest on record is April 5, 2017 and the latest is May 7, 2022.