Marinette County Lake Quality
Wisconsin, 22 lakes, average grade A (Excellent)
There are 22 graded lakes in Marinette County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The county's average grade is A — among the cleanest in Wisconsin. 21 lakes pull an A on their own, and almost none fall into the D or F brackets.
A meaningful share of Marinette's lakes break 50 feet of depth, which matters because deep lakes hold cooler water all summer and resist the resuspended-sediment problems that plague shallow basins. The county's best-graded lake is Bass Lake (A).
Quick Answers for Marinette County
Planning a trip? Check special fishing regulations for Bass Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
DNR Reports (19)
Wisconsin DNR Fisheries Survey resources for lakes in Marinette County. Showing 12 most recent — browse all reports →
- 2022Gilas Lake comprehensive survey, 2022Comprehensive Survey · WI DNR · 2022 (PDF)
- 2021Hilbert Lake comprehensive survey, 2021Comprehensive Survey · WI DNR · 2021 (PDF)
- 2020Timms Lake fishery summary, 2020Fisheries Survey · WI DNR · 2020 (PDF)
- 2018Eagle Creek Trend survey, 2018Fisheries Survey · WI DNR · 2018 (PDF)
- 2018Grand Rapids Flowage electrofishing survey, 2018Fisheries Survey · WI DNR · 2018 (PDF)
- 2018High Falls Flowage comprehensive survey, 2018Comprehensive Survey · WI DNR · 2018 (PDF)
- 2018KC Creek trout trend survey, 2018Trout Survey · WI DNR · 2018 (PDF)
- 2018North Branch Pike River trout trend survey, 2018Trout Survey · WI DNR · 2018 (PDF)
- 2018Upper Middle Inlet trout trend survey, 2018Trout Survey · WI DNR · 2018 (PDF)
- 2017Big Quinnesec Flowage electrofishing survey, 2017Fisheries Survey · WI DNR · 2017 (PDF)
- 2017North Branch Beaver Creek Trend survey 2017Fisheries Survey · WI DNR · 2017 (PDF)
- 2016Glen Lake electrofishing survey, 2016Fisheries Survey · WI DNR · 2016 (PDF)
All Lakes in Marinette County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Bass Lake | A | 36.9 ft | 65 ft | - |
| 2 | Lily Lake | A | 78.7 ft | - | - |
| 3 | Lost Lake | A | - | 18 ft | 13.3 µg/L |
| 4 | Thunder Lake | A | 57.4 ft | 62 ft | 10.3 µg/L |
| 5 | Mary Lake | A | 28.5 ft | 38 ft | 13.5 µg/L |
| 6 | Eagle Lake | A | 49.2 ft | 30 ft | - |
| 7 | Big Newton Lake | A | 55.8 ft | 40 ft | 10.4 µg/L |
| 8 | Lake Noquebay | A | 23.8 ft | 51 ft | 19.4 µg/L |
| 9 | Caldron Falls Reservoir | A | 17.7 ft | 40 ft | - |
| 10 | Town Corner Lake | A | 32.8 ft | - | 15 µg/L |
| 11 | Gilas Lake | A | 47.6 ft | 88 ft | 12.6 µg/L |
| 12 | Little Newton Lake | A | 34.5 ft | 53 ft | 12.8 µg/L |
| 13 | Shannon Lake | A | 24.6 ft | 37 ft | 18.5 µg/L |
| 14 | Smith Lake | A | - | 11 ft | 15.6 µg/L |
| 15 | King Lake | A | - | 70 ft | 9 µg/L |
| 16 | High Falls Reservoir at | A | 31.2 ft | 54 ft | - |
| 17 | Hilbert Lake | A | 39.4 ft | 32 ft | 13.1 µg/L |
| 18 | Sandstone Flowage Lake | A | 18 ft | - | - |
| 19 | Oneonta Lake | A | 24.6 ft | 24 ft | 13.6 µg/L |
| 20 | Montana Lake | A | 26.2 ft | 28 ft | 17.5 µg/L |
| 21 | Little Mccall Lake | A | - | 21 ft | 13.8 µg/L |
| 22 | Yankee Lake | B | 9.8 ft | 20 ft | 26.5 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.