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Ellwood Lake
Enhanced dataInteractive depth contours
Ellwood LakeFlorence 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 99% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 25-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 Ellwood Lake.
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Fishing forecast
Best windows for Ellwood 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
Ellwood Lake 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 Ellwood Lake - Deep Hole.
Sampled Jun 2026Volunteer monitoring since 1994
Clear, low-algae water — summer clarity of 12.6 ft is clearer than most monitored Wisconsin lakes.
Based on July–August volunteer averages from 2022–2025; each value shows its own year.45Mesotrophic5-yr summer TSI
Moderately clear with moderate nutrients — a typical profile for good swimming lakes.
Water claritySecchi disk depth
12.6 ftJul–Aug 2022 avg (4 readings)
ClearStable since 2014
Clearer than 74% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
4.5 µg/LJul–Aug 2025 avg (2 readings)
LowWorsening — up ~26% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
12 µg/LLatest single sample · 2021-07-27
LowLow phosphorus means light plant/algae growth pressure.
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 | 13.0 ft (1) | 4.5 µg/L (2) | — |
| 2024 | 10.0 ft (1) | 4.0 µg/L (2) | — |
| 2022 | 12.6 ft (4) | 4.5 µg/L (2) | — |
| 2021 | 13.4 ft (5) | 4.3 µg/L (3) | 12.0 µg/L (1) |
| 2020 | 13.3 ft (5) | 3.5 µg/L (2) | — |
| 2019 | 13.9 ft (6) | — | — |
| 2018 | 11.7 ft (2) | 2.5 µg/L (2) | — |
| 2014 | 10.9 ft (2) | 2.5 µg/L (2) | — |
| 2013 | 13.0 ft (1) | — | — |
| 2012 | 14.0 ft (2) | 3.0 µg/L (1) | 12.0 µg/L (1) |
Latest individual samples: Secchi 13 ft (2025-08-05), chlorophyll-a 3 µg/L (2026-06-20), and total phosphorus 12 µg/L (2021-07-27).
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.
Ellwood Lake - Deep HoleStation 193013 · 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 maps1 converted map sheetView 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
Ellwood Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Ellwood 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 650500 · 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 2022 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 contextThe report is specific to Lake Ellwood and covers a June 14-15, 2022 late-spring panfish fyke-net survey of ten net-nights. Target-panfish and bycatch values retain this survey scope and are not whole-population estimates.
The 2022 survey documented a nearly five-fold bluegill CPUE increase since 2012 and a large rock bass increase after herbicide treatments stopped, with successful recruitment but relatively low size structure.
- The report title uses Lake Ellwood while the exact LakeList canonical name is Ellwood Lake; the queue, county, UUID and WBIC identify the same target.
- The survey targeted summer-spawning panfish, and the report states other species were not represented fairly by this gear.
Bluegill
461 fishBluegill captured · p. 246.1 fish/net-nightBluegill CPUE · p. 238.4 percentShare at least 6 inches · p. 216.3 percentShare at least 7 inches · p. 1
Bluegill x pumpkinseed hybrid
0.1 fish/net-nightHybrid sunfish CPUE · p. 2
Largemouth bass
0.1 fish/net-nightLargemouth bass CPUE · p. 2
Northern pike
0.1 fish/net-nightNorthern pike CPUE · p. 2
Rock bass
20.5 fish/net-nightRock bass CPUE · p. 224.7 percentShare at least 6 inches · p. 15.4 percentShare at least 7 inches · p. 22.7 percentShare at least 8 inches · p. 1
Smallmouth bass
0.1 fish/net-nightSmallmouth bass CPUE · p. 2
Walleye
0.1 fish/net-nightWalleye CPUE · p. 2
White sucker
0.3 fish/net-nightWhite sucker CPUE · p. 2
Yellow perch
1.6 fish/net-nightYellow perch CPUE · p. 2
Ellwood Lake shocking and netting survey, 2022Matched by exact lakelist id name county state wbic · WBICs 650500 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this report with source attribution.
Wisconsin DNR · 2026–2027 season
Lake-specific fishing regulations
Rule text published by the DNR for this waterbody, cached by WBIC and verified 2026-07-12.
All species
Catch and release fishing for largemouth and smallmouth bass is open year round unless otherwise noted. Motor Trolling is allowed with 1 hook, bait, or lure per angler, and 3 hooks, baits, or lures maximum per boat.
Catfish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is 10.
Cisco and whitefish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is 10.
Lake sturgeon
Season Dates: Closed. No fishing allowed.
Largemouth and smallmouth bass
Season Dates: June 20, 2026 to March 7, 2027. The minimum length limit is 14" and the daily bag limit is 5.
Muskellunge and hybrids
Season Dates: May 2, 2026 to December 31, 2026 on open water. The minimum length limit is 40" and the daily bag limit is 1.
Northern pike
Season Dates: May 2, 2026 to March 7, 2027. The minimum length limit is 40" and the daily bag limit is 1.
Paddlefish
Season Dates: Closed. No fishing allowed.
Panfish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is 25.
Rock, yellow, and white bass
Season Dates: Open All Year. No minimum length limit and the daily bag limit is unlimited.
Rough fish
Season Dates: Open All Year. No minimum length limit and the daily bag limit is unlimited.
Shovelnose sturgeon
Season Dates: Closed. No fishing allowed.
Trout and salmon
See Trout regulations layer.
Urban waters gamefish
This waterbody is not considered an urban water, Urban Waters Gamefish regulations do not apply.
Walleye, sauger, and hybrids
Season Dates: May 2, 2026 to March 7, 2027. The minimum length limit is 15" and the daily bag limit is 3.
Regulations can change. The official DNR page controls; verify seasons, boundaries, bag limits, and emergency rules before fishing.
130surface acres
25max depth feet
1public access points
45.8577, -88.1421latitude, longitude
Access
Public access points
Boat launchEllwood Lake Access45.85332, -88.14343Managed by TOWNSHIPTOWN OF FLORENCERamp surface: Concrete PanelsADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
PanfishSmallmouth BassLargemouth BassNorthern Pike
Depth FAQ
How deep is Ellwood Lake?
Ellwood Lake is 25 feet deep at its deepest point and averages about 15 feet, according to Wisconsin DNR records.
Is there a free depth map of Ellwood Lake?
Yes. LakeList publishes a free interactive depth contour map of Ellwood 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 Ellwood 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 Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14