LakeList
FavoritesStateWisconsin
Osprey Lake
Enhanced dataInteractive depth contours
Osprey LakeSawyer 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 78% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 32-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 Osprey Lake.
Start here
Fishing forecast
Best windows for Osprey Lake
Weather-based planning built from the National Weather Service hourly forecast near this lake.
Loading latest forecast…
Checking wind, precipitation, and near-term weather windows.
Water temperature
Osprey 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 Osprey Lake - Deepest Spot (OSP-1).
Last sampled Sep 2024
Through 2024, very clear, low-algae water — summer clarity of 16 ft puts it among the clearest quarter of monitored Wisconsin lakes.
Based on July–August volunteer averages from 2023–2024; each value shows its own year.37Oligotrophic5-yr summer TSI
Very clear, low-nutrient water — often deep, with limited plant growth.
Water claritySecchi disk depth
16 ftJul–Aug 2023 avg (2 readings)
Crystal clearImproving — up ~26% vs earlier years
Clearer than 83% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
3 µg/LJul–Aug 2024 avg (2 readings)
LowStable since 2011
NutrientsTotal phosphorus — fuels plant & algae growth
17 µg/LJul–Aug 2024 avg (3 readings)
Low2021–2024
Low 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 |
|---|---|---|---|
| 2024 | — | 3.0 µg/L (2) | 17.0 µg/L (3) |
| 2023 | 16.0 ft (2) | 1.5 µg/L (2) | 19.0 µg/L (3) |
| 2022 | 15.2 ft (3) | — | 16.5 µg/L (2) |
| 2021 | 17.5 ft (1) | 2.0 µg/L (2) | 18.3 µg/L (3) |
| 2015 | — | 2.0 µg/L (1) | — |
| 2014 | 11.9 ft (2) | 2.0 µg/L (1) | — |
| 2013 | 14.7 ft (2) | 2.0 µg/L (2) | — |
| 2012 | 12.2 ft (2) | 3.0 µg/L (2) | — |
| 2011 | 10.0 ft (1) | 4.0 µg/L (1) | — |
| 2009 | 18.4 ft (1) | 2.0 µg/L (1) | — |
Latest individual samples: Secchi 15 ft (2023-09-16), chlorophyll-a 2 µg/L (2024-08-24), and total phosphorus 11 µg/L (2024-09-03).
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.
Osprey Lake - Deepest Spot (OSP-1)Station 10039031 · 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
Osprey Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Osprey 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 2395100 · 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.
Fishbrain community activity
Recent catch activity
Aggregated public catch activity matched to Osprey Lake (Squaw Lake). Exact catch locations and angler details are not shown.
Most reported species in this extract
Bluegill1Rock bass1Northern pike1
Catch analytics
Seasonal fish catch patterns
Pick a species to see when anglers reported it, compare against all fish by month, then scan year-by-year catch volume.
Bluegill by monthMonthly reports tagged as Bluegill.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
All fish by monthTotal public catch reports across every listed species.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Yearly catch viewYear-by-year public catch volume.
No yearly catch aggregates yet.
Catch counts are community reports, not a population survey or a guarantee of current fishing conditions.
View source on Fishbrain214surface acres
32max depth feet
1public access points
45.9779, -91.2972latitude, longitude
Access
Public access points
Boat launchOsprey Lake Access45.97295, -91.29863Managed by OTHERTOWN OF HAYWARDRamp surface: GravelADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassPanfishWalleyeMuskyNorthern PikeSmallmouth Bass
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2025, when 1,700 fish were recorded across 1 entry.
2025
WalleyeChippewa/St. Croix · Large Fingerling
1,7007.1 in average
2022
WalleyeMississippi Headwaters · Large Fingerling
2,1396.8 in average
2021
MuskellungeUpper Chippewa River · Large Fingerling
6413.9 in average
2020
WalleyeMississippi Headwaters · Large Fingerling
2,1396.5 in average
2018
WalleyeMississippi Headwaters · Large Fingerling
2,1376.3 in average
2016
WalleyeMississippi Headwaters · Large Fingerling
2,1397.1 in average
2014
WalleyeMississippi Headwaters · Large Fingerling
2,1396.3 in average
2012
WalleyeLac Courte Oreilles · Small Fingerling
8,0004.5 in average
2011
WalleyeLac Courte Oreilles · Large Fingerling
1,0007.8 in average
2010
WalleyeMississippi Headwaters · Small Fingerling
10,9284.5 in average
2010
WalleyeLac Courte Oreilles · Small Fingerling
10,4281.9 in average
Depth FAQ
How deep is Osprey Lake?
Osprey Lake is 32 feet deep at its deepest point and averages about 12 feet, according to Wisconsin DNR records.
Is there a free depth map of Osprey Lake?
Yes. LakeList publishes a free interactive depth contour map of Osprey 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 Osprey 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
Keep exploring