Minnesota · DNR survey data
Long Lake
Long Lake covers 143 acres in Cass County, running to 48 feet, last surveyed by the DNR in 2025. The Minnesota DNR has not published bathymetry for this lake, so there is no depth map here, just the survey record: what the nets held and how big it ran.
DNR survey data
Fish species
WalleyeFair numbers3.8per gill net15"Typical20"Biggest
Lengths measured · 25 fish
Recent · 2025Lengths measured · 25 fish
2025Lengths measured · 20 fish
2015Lengths measured · 35 fish
2001Lengths measured · 42 fish
1996Largemouth bassPresent2.1per trap net11"Typical16"Biggest
Lengths measured · 64 fish
Recent · 2025Lengths measured · 64 fish
2025Lengths measured · 23 fish
2015Lengths measured · 18 fish
2001Lengths measured · 75 fish
1996Northern pikeJust a few3.2per gill net19"Typical22"Biggest
Lengths measured · 24 fish
Recent · 2025Lengths measured · 24 fish
2025Lengths measured · 12 fish
2015Lengths measured · 35 fish
2001Lengths measured · 34 fish
1996Yellow perchFair numbers3.7per gill net6"Typical7"Biggest
Lengths measured · 22 fish
Recent · 2025Lengths measured · 22 fish
2025Lengths measured · 9 fish
2001Only 9 fish measured that year — too few to read as a shape.
Lengths measured · 15 fish
1996Rock bassElite fishery18.5per gill net8"Typical11"Biggest
Lengths measured · 149 fish
Recent · 2025Lengths measured · 149 fish
2025Lengths measured · 148 fish
2015Lengths measured · 107 fish
2001Lengths measured · 59 fish
1996Rates come from standard DNR survey gear (gill nets, trap nets, electrofishing), judged against statewide benchmarks for the same gear — which is why the same number of fish per net can read differently for two species. Where the standard gear can't count a species reliably, the page shows presence and size only. Typical is the middle fish of those measured. Open a row for the full length spread, survey by survey. You can read every number on this page without an app or an account.
Recent reports
Long Lake fishing reports
Recent reports on Long Lake from guides, tournaments and regular anglers. Anything posted in the last two weeks also bumps the matching spots on the live map, so you'll see a "matches a recent report" tag on them.
Public water access
Getting on the water
- Long Lake, Deerfield (trailer launch)
Within 30 miles
Nearby lakes
- Perch Lake · 13 ac · 2.7 mi
- Pine Mountain Lake · 1,617 ac · 2.7 mi
- Beuber Lake · 132 ac · 3.2 mi
- Variety Lake · 160 ac · 4 mi
- Bowen Lake · 182 ac · 4.7 mi
- Horseshoe Lake · 260 ac · 4.9 mi
- Lind Lake · 440 ac · 5.2 mi
- Willard Lake · 8 ac · 5.5 mi
Quick answers
Frequently asked questions
Is there a depth map for Long Lake?
The Minnesota DNR has not published bathymetry for Long Lake, so this page carries the survey record instead: species, catch rates and stocking history.
What fish are in Long Lake?
The most recent DNR survey (2025) recorded walleye, largemouth bass, northern pike, yellow perch, rock bass.
Does Long Lake have a public access?
Yes. Long Lake has one public access site: Long Lake, Deerfield (trailer launch).
Is Long Lake stocked?
No stocking is on record for Long Lake in the DNR's stocking database.
When was Long Lake last surveyed?
The Minnesota DNR last surveyed Long Lake in 2025, the most recent of 6 surveys on record.
Survey numbers are the Minnesota DNR's. How this site reads them →
Page updated .