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Bolger Lake
Enhanced dataInteractive depth contours
Bolger LakeOneida 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 72% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 45-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 Bolger Lake.
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Fishing forecast
Best windows for Bolger Lake
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
Bolger Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
71°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
Historical volunteer-monitoring record for this lake.
Last sampled Jun 2025Volunteer monitoring 2000–2025
DNR volunteers monitored this lake for about 25 years, ending in 2025. Its final monitored summers showed clear water (~15 ft Secchi) in 2020, very low algae (chlorophyll ~2 µg/L) in 2001, and very low nutrients (phosphorus ~7 µg/L) in 2000. After 1 year without samples, these readings describe the lake as it was, not as it is.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2024 | 11.5 ft (1) | — | — |
| 2020 | 15.0 ft (3) | — | — |
| 2019 | 17.0 ft (2) | — | — |
| 2018 | 16.0 ft (3) | — | — |
| 2017 | 15.3 ft (3) | — | — |
| 2016 | 18.0 ft (4) | — | — |
Bolger Lake - Deep HoleStation 443059
Historical record only — no current water-quality data exists for this lake. 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 maps1 converted map sheetFishing 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
Bolger Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Bolger Lake · sheet 1
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 973000 · 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.
Official fishing intelligence
Fishing reports and forecasts
LakeList matched these official resources by exact lake name and county. Report text stays with the publisher.
Largemouth bass2026–2027 season · Wisconsin DNRSource verified 2026-07-13Smallmouth bass2026–2027 season · Wisconsin DNRSource verified 2026-07-13
Forecasts describe DNR survey findings and expected opportunities; they are not real-time catch reports or a guarantee of fishing conditions.
Wisconsin DNR fisheries survey
Fish population survey
Structured LakeList extraction from the 2025 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 contextLake-specific 2025 treaty-assessment survey using spring netting, early/late-spring electrofishing, targeted bass angling and fall electrofishing. Population estimates remain distinct from multi-gear encounter totals.
DNR found increasing bass abundance, stocked muskellunge and walleye populations, low recent walleye recruitment, and abundant but mostly sub-quality bluegill and yellow perch in this low-productivity lake.
- All muskellunge handled corresponded to stocking years, but the report recommends a 2026 recapture survey rather than claiming a completed population estimate.
- The female walleye growth model failed to converge; only the explicit male modeled value and confidence interval are loaded.
- The three population-estimate plus-or-minus errors are preserved as printed; unprinted lower and upper bounds are not calculated.
- A figure caption on PDF page 17 incorrectly says Mildred Lake, so no value is taken from that mislabeled figure; narrative Bolger Lake values remain.
Black crappie
1 fishTotal captured · p. 19
Bluegill
201 fishTotal captured · p. 91.1 inchesMinimum captured length · p. 98.6 inchesMaximum captured length · p. 93.2 inchesMean captured length · p. 9
Bluntnose minnow
17 fishTotal captured · p. 19
Central mudminnow
4 fishTotal captured · p. 19
Largemouth bass
142 fishTotal captured · p. 1132.1 fish/mileSurvey CPUE · p. 114.6 inchesMinimum captured length · p. 1118.5 inchesMaximum captured length · p. 11
Mimic shiner
5 fishTotal captured · p. 19
Mottled sculpin
1 fishTotal captured · p. 19
Muskellunge
20 fishTotal captured · p. 1216.9 inchesMinimum captured length · p. 1240 inchesMaximum captured length · p. 1226.2 inchesMean captured length · p. 12
Northern pike
8 fishTotal captured · p. 1913.5 inchesMinimum captured length · p. 1927.5 inchesMaximum captured length · p. 19
Pumpkinseed
7 fishTotal captured · p. 19
Rock bass
137 fishTotal captured · p. 19
Smallmouth bass
236 fishTotal captured · p. 1442.3 fish/mileSurvey CPUE · p. 142.1 inchesMinimum captured length · p. 1420.8 inchesMaximum captured length · p. 14
Walleye
313 fishTotal captured · p. 157.5 inchesMinimum captured length · p. 1526 inchesMaximum captured length · p. 1516.4 inchesMean captured length · p. 15
White sucker
5 fishTotal captured · p. 19
Yellow bullhead
2 fishTotal captured · p. 19
Yellow perch
575 fishTotal captured · p. 1822.3 fish/net-nightSurvey CPUE · p. 181.9 inchesMinimum captured length · p. 188.2 inchesMaximum captured length · p. 18
2025 Bolger Fisheries Survey Report, Oneida CountyMatched by exact wbic and name county · WBICs 973000 · verified 2026-07-18Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this report with source attribution.
115surface acres
45max depth feet
1public access points
45.8421, -89.7201latitude, longitude
Access
Public access points
Boat launchBolger Lake Access45.84460, -89.72050Managed by STATE(DNR)TOWN OF MINOCQUARamp surface: Concrete PlankADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassPanfishMuskySmallmouth BassWalleye
Depth FAQ
How deep is Bolger Lake?
Bolger Lake is 45 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Bolger Lake?
Yes. LakeList publishes a free interactive depth contour map of Bolger Lake 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 Bolger Lake 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 Pagesname, coordinates, county, source identifiers
LakeList record updated 2026-07-12