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Lake Thompson
Enhanced dataInteractive depth contours
Lake ThompsonOneida County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Sonar-derived depth (C-MAP Genesis) · Gaps interpolated · Not for navigation
Source: C-MAP Genesis community sonar (derived)high confidence · QA passed · Select a contour to inspect its mapped depthDepths decoded from C-MAP Genesis Social Map community sonar recordings (used with permission), covering 86% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 30-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Lake Thompson.
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Fishing forecast
Best windows for Lake Thompson
Weather-based planning built from the National Weather Service hourly forecast near this lake.
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Checking wind, precipitation, and near-term weather windows.
Water temperature
Lake Thompson water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
74°FWarm
Seasonal estimate. Checking current National Weather Service air temperatures…
Comfortable summer pattern. Bass and panfish are active; early and late hours beat the midday heat.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Lake Thompson - Deep Hole.
Sampled Aug 2025Volunteer monitoring since 1993
Somewhat hazy water — summer clarity of 5.5 ft ranks among the lowest of monitored Wisconsin lakes.
Based on July–August volunteer averages from 2023–2024; each value shows its own year.55Eutrophic5-yr summer TSI
Nutrient-rich, greener water — more algae and plant growth, common in shallower lakes.
Water claritySecchi disk depth
5.5 ftJul–Aug 2023 avg (2 readings)
HazyImproving — up ~24% vs earlier years
Clearer than 14% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
12 µg/LJul–Aug 2024 avg (2 readings)
ElevatedImproving — down ~23% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
24 µg/LLatest single sample · 2021-06-20
ModerateModerate phosphorus can support noticeable plant/algae growth.
All readings by year · station details · methodology
Summer averages (July/August)
July/August means; counts in parentheses show how many samples went into each average.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2025 | 4.0 ft (1) | 7.0 µg/L (1) | — |
| 2024 | — | 12.0 µg/L (2) | — |
| 2023 | 5.5 ft (2) | 11.5 µg/L (2) | — |
| 2022 | 4.8 ft (2) | 6.0 µg/L (1) | — |
| 2021 | 3.0 ft (2) | 25.5 µg/L (2) | — |
| 2020 | 4.0 ft (2) | 8.0 µg/L (2) | 23.0 µg/L (1) |
| 2019 | 4.5 ft (2) | 13.5 µg/L (2) | — |
| 2018 | 3.3 ft (2) | 14.0 µg/L (2) | 26.0 µg/L (1) |
| 2017 | 3.3 ft (2) | 11.5 µg/L (2) | — |
| 2016 | 3.8 ft (2) | 8.5 µg/L (2) | — |
Latest individual samples: Secchi 4 ft (2025-08-05), chlorophyll-a 7 µg/L (2025-07-28), and total phosphorus 24 µg/L (2021-06-20).
Secchi clarity is how deep a black-and-white disk stays visible from the surface — more feet means clearer water.
Chlorophyll-a is an algae pigment; higher values signal more algae in the water column.
Total phosphorus is a nutrient that feeds algae and aquatic plants. It is not a weed survey — depth, bottom type, water movement, and management change the actual lake experience.
Lake Thompson - Deep HoleStation 443408 · TSI based on chlorophyll
Modeled from DNR/CLMN monitoring — not a safety or swim-condition report. Verify current conditions locally. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps5 converted map sheetsView DNR depth mapHistorical map · not for navigationFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Lake Thompson depth maps
5 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Lake Thompson · sheet 2
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 1569900 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
Wisconsin DNR fisheries survey
Fish population survey
Structured LakeList extraction from the 2005 DNR fisheries survey. Population estimates, density, and catch-rate indices use different units, methods, and scopes, so each value is presented in its original form rather than normalized against a different measure.
Survey indicatorsValues keep their source unit and method; unlike measures are not scaled or compared.
Management contextexact named lake
Human-reviewed population, catch, recapture, length and density metrics for exact Lake Thompson, named Thompson Lake in the DNR report.
- Historical survey snapshot; not current regulations or navigation guidance.
- Stocking histories, regulations, recommendations, comparison-water values, creel values and unsupported chart-only values were excluded.
- The public Pine Lake source is marked draft, so its draft status is retained in limitations even though its exact Forest County name and WBIC are verified.
Largemouth Bass
10 fish2005 spring survey catch count · p. 667 fish2005 summer mini fyke juvenile catch count · p. 629 fish2005 fall electrofishing catch count · p. 6
Muskellunge
9 fish2005 spring adult male catch count · p. 71 fish2005 spring adult female catch count · p. 75 fish2005 fall adult catch count · p. 73 fish2005 fall juvenile catch count · p. 7
Northern Pike
122 fish2005 survey catch count · p. 81 fish2005 juvenile catch count · p. 820 fish2005 recapture count · p. 8265 fish2005 adult population estimate · p. 8
Smallmouth Bass
2 fish2005 spring survey catch count · p. 61 fish2005 summer mini fyke juvenile catch count · p. 62 fish2005 measured adult count · p. 618 inches2005 min adult length · p. 6
Walleye
222 fish2005 spring fyke net catch count · p. 335 fish2005 recapture count · p. 35 fish2005 juvenile catch count · p. 36.9 fish/net-night2005 spring fyke net cpue · p. 3
Fisheries survey of Thompson Lake, 2005Matched by exact wbic county and reviewed name alias lakelist uuid · WBICs 1569900 · verified 2026-07-21Wisconsin DNR fisheries report; LakeList operator documented permission to leverage this public report with source attribution.
401surface acres
30max depth feet
1public access points
45.6339, -89.3304latitude, longitude
Access
Public access points
Boat launchBoat Launch at North end of lake - N Shore Drive45.63561, -89.32603Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
PanfishMuskyNorthern PikeWalleyeLargemouth BassSmallmouth Bass
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2022, when 8,000 fish were recorded across 1 entry.
2022
WalleyeMississippi Headwaters · Large Fingerling
8,0006.8 in average
2020
WalleyeMississippi Headwaters · Large Fingerling
8,0246.9 in average
2018
WalleyeMississippi Headwaters · Large Fingerling
8,0247.2 in average
2016
WalleyeMississippi Headwaters · Large Fingerling
8,0217.7 in average
2014
WalleyeMississippi Headwaters · Large Fingerling
8,0227.5 in average
Depth FAQ
How deep is Lake Thompson?
Lake Thompson is 30 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Lake Thompson?
Yes. LakeList publishes a free interactive depth contour map of Lake Thompson at a typical 5-foot interval, with an optional 3D underwater view, derived from C-MAP Genesis community sonar (derived) survey data.
Where does the Lake Thompson depth map come from?
The interactive depth contours are derived from C-MAP Genesis community sonar (derived). Each contour set passes a visual QA review against the source document before it is published. The depths are derived from community sonar recordings (C-MAP Genesis Social Map, used with permission), with gaps between recordings interpolated; not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14
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