Thunder Lake
Cass County, Minnesota, near Remer. DNR lake ID 11006200.
Thunder Lake is a 1,347-acre lake in Cass County, Minnesota, near Remer. Its deepest point reaches 95 ft, and about 17% of the lake is shallower than 15 feet. Summer water clarity averages 16.3 feet in Minnesota Pollution Control Agency monitoring, which places it in the oligotrophic nutrient class. The DNR lists it for Eurasian watermilfoil, starry stonewort, zebra mussel. DNR surveys document walleye, northern pike, largemouth bass, smallmouth bass, black crappie, bluegill.
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Quick facts
| DNR lake ID | 11006200 |
|---|---|
| County | Cass County, near Remer |
| Surface area | 1,347 acres |
| Maximum depth | 95 ft |
| Mean depth | 37.0 ft |
| Share under 15 ft | 17% |
| Water clarity (summer) | 16.3 ft through 2025 |
| Phosphorus (summer) | 11.5 µg/L |
| Algae, chlorophyll-a (summer) | 3.2 µg/L |
| Nutrient class | Oligotrophic |
| Clarity trend | Clearer (2016 to 2025) |
| Invasive species | Eurasian watermilfoil, starry stonewort, zebra mussel |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 16.3 ft, phosphorus 11.5 µg/L, algae (chlorophyll-a) 3.2 µg/L. Using the Carlson trophic state index, Thunder Lake rates as oligotrophic. Summer clarity trend 2016 to 2025: clearer.
Fishing on Thunder Lake
The most recent DNR standard fish survey was in 2017 (9 years ago). Catch per net is compared with the DNR’s typical range for lakes of the same type.
| Species | Net | Catch per net | Typical range |
|---|---|---|---|
| Walleye | gill | 6.0 | 1.3 to 5.5 |
| Walleye | trap | 4.08 | 0.2 to 0.7 |
| Northern pike | gill | 1.83 | 3.1 to 8.5 |
| Northern pike | trap | 0.17 | n/a |
| Yellow perch | gill | 29.83 | 2.5 to 24.2 |
| Yellow perch | trap | 2.25 | 0.5 to 2.7 |
| Black crappie | gill | 0.5 | 0.5 to 2.7 |
| Black crappie | trap | 1.67 | 0.7 to 3.2 |
| Bluegill | gill | 2.08 | n/a |
| Bluegill | trap | 39.42 | 5.6 to 42.3 |
| Largemouth bass | gill | 1.17 | 0.3 to 1.2 |
| Largemouth bass | trap | 0.83 | 0.3 to 1.1 |
| Smallmouth bass | gill | 3.08 | 0.2 to 1.0 |
| Smallmouth bass | trap | 0.33 | 0.1 to 0.4 |
| Tullibee (cisco) | gill | 5.92 | 0.7 to 6.5 |
| Pumpkinseed | gill | 0.33 | n/a |
| Pumpkinseed | trap | 1.92 | 1.7 to 8.2 |
| Rock bass | gill | 5.67 | 0.3 to 2.0 |
| Rock bass | trap | 7.5 | 0.6 to 2.5 |
| Hybrid sunfish | gill | 0.17 | n/a |
| Hybrid sunfish | trap | 2.58 | n/a |
| Burbot | gill | 0.42 | 0.1 to 0.4 |
Walleye catch was above the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Northern pike 39.0 in (2017), Smallmouth bass 19.0 in (2017), Largemouth bass 18.0 in (2017), Walleye 29.0 in (2022).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Smallmouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Hybrid sunfish, Rock bass, Tullibee (cisco), Lake whitefish, Burbot, Bowfin, White sucker, Yellow bullhead, Brown bullhead.
Fishing regulations
No lake-specific regulation found in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Regulations change. Confirm with the DNR before fishing.
Invasive species
On the Minnesota DNR infested waters list for: Eurasian watermilfoil (listed 2026), starry stonewort (listed 2022), zebra mussel (listed 2022).
Public boat access
- Big Thunder Lake: 1 concrete slab launch ramp, 1 dock, 15 trailer spaces. 8 miles North of Outing on MN Hwy. 6, then 2 miles West and North on Thunder Lake Township Road #10. Directions
DNR water access records (2023). Confirm current conditions with the DNR.
Nearby lakes
- Kidney Lake 1.8 mi, Cass County
- Little Thunder Lake 1.8 mi, Cass County
- Little Bass Lake 1.9 mi, Cass County
- Coffin Lake 2.2 mi, Cass County
- Bass Lake 2.8 mi, Cass County
- Laura Lake 2.9 mi, Cass County
- Island Lake 3.4 mi, Cass County
- Upper Trelipe Lake 3.4 mi, Cass County
Questions about Thunder Lake
How deep is Thunder Lake?
Thunder Lake reaches a maximum depth of 95 ft according to Minnesota DNR records. About 17% of the lake is shallower than 15 feet.
How big is Thunder Lake?
Thunder Lake covers about 1,347 acres in Cass County, Minnesota.
How clear is Thunder Lake?
Summer water clarity on Thunder Lake averages 16.3 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is oligotrophic.
Does Thunder Lake have zebra mussels or other invasive species?
The Minnesota DNR infested waters list includes Thunder Lake for Eurasian watermilfoil, starry stonewort, zebra mussel.
What fish are in Thunder Lake?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, smallmouth bass, black crappie, bluegill, yellow perch, pumpkinseed, hybrid sunfish, rock bass in Thunder Lake. The most recent standard survey was in 2017.
Where is the public boat access on Thunder Lake?
Thunder Lake has 1 public water access site on DNR record: Big Thunder Lake.
How is the walleye population on Thunder Lake?
In Minnesota DNR net surveys from 1990 to 2017, walleye numbers on Thunder Lake ran mostly above the typical range for similar lakes. Nets measure how many fish a lake holds, not where they’re biting, so local guides are the best source for current fishing.
Are there lake homes for sale on Thunder Lake?
Homes on Thunder Lake come up for sale throughout the year, and some sell before they’re ever publicly advertised. Tell us what you’re looking for and our agents will run a custom search and send you matching homes on Thunder Lake and nearby lakes, including off-market opportunities when available.
What is it like to live on Thunder Lake?
A mid-size lake with room for boating and fishing, about 17% shallow shoreline under 15 feet, and summer clarity around 16.3 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Thunder Lake?
No lake-specific regulation was found for Thunder Lake in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Thunder Lake
Whether you’re buying, selling, or just curious, our team works Cass County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2017), DNR infested waters list (Sept 2026), Minnesota Rules 6264.0400 (April 2026), MPCA monitoring via the Water Quality Portal, DNR water access records (2023), LAGOS-US. Lakewide information from public data; it does not describe any specific property. Verify shoreline, bottom type, and depth at any frontage.