LakeList
FavoritesStateWisconsin
Long Lake
Enhanced dataInteractive depth contours
Long LakeWashburn 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 66% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 74-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 Long Lake.
Start here
Fishing forecast
Best windows for Long 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
Long 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
From Wisconsin DNR / Citizen Lake Monitoring readings at Long Lake north channel near Blackhawk Rd.
Sampled May 2026Volunteer monitoring since 1991
Moderate nutrients in the most recent monitored summers.
Based on the newest individual DNR samples — too few to average.53Eutrophic5-yr summer TSI
Nutrient-rich, greener water — more algae and plant growth, common in shallower lakes.
NutrientsTotal phosphorus — fuels plant & algae growth
25 µg/LLatest single sample · 2026-05-28
ModerateModerate phosphorus can support noticeable plant/algae growth.
All readings by year · station details · methodology
Latest individual samples: total phosphorus 25 µg/L (2026-05-28).
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.
Long Lake north channel near Blackhawk RdStation 10060451 · 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 maps9 converted map sheetsFishing 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
Long Lake depth maps
9 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Long 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 2106800 · 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 Long Lake. Exact catch locations and angler details are not shown.
Most reported species in this extract
Largemouth bass144Northern pike50Smallmouth bass45Walleye31Rock bass31Bluegill24Black crappie13
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.
Largemouth bass by monthMonthly reports tagged as Largemouth bass.
Jan
Feb
Mar
Apr
May
1Jun
Jul
Aug
Sep
Oct
Nov
Dec
All fish by monthTotal public catch reports across every listed species.
Jan
Feb
Mar
Apr
May
6Jun
6Jul
Aug
Sep
Oct
Nov
Dec
Yearly catch view2026 had the most reported catch activity.
20261 Largemouth bass12 all fish
Recent catch detailsLatest authorized records; measurements appear only when reported.
- BluegillCommunity report · Jul 11, 2026
- Species not listedCommunity report · Jul 11, 2026
- Smallmouth bassCommunity report · Jul 5, 2026Released
- WalleyeCommunity report · Jul 4, 2026
- Rock bassCommunity report · Jul 3, 2026
- Northern pikeCommunity report · Jul 2, 202624 in3.5 lb
- BluegillCommunity report · Jun 28, 20268 in0.4 lbReleased
- BluegillCommunity report · Jun 28, 20266 in0.2 lb
- Species not listedCommunity report · Jun 28, 2026
- Largemouth bassCommunity report · Jun 28, 202615 in1.6 lb
Catch counts are community reports, not a population survey or a guarantee of current fishing conditions.
View source on Fishbrain3,478surface acres
74max depth feet
4public access points
45.7212, -91.6943latitude, longitude
Access
Public access points
Boat launchHanks Landing - Long Lake Access45.73054, -91.70388Managed by TOWNSHIPTOWN OF MADGERamp surface: ConcreteADA-accessible feature: NoVerified 2026-07-12
Boat launchLong Lake Access45.68770, -91.68653Managed by TOWNSHIPTOWN OF LONG LAKERamp surface: ConcreteADA-accessible feature: NoVerified 2026-07-12
Boat launchLong Lake Access45.75599, -91.65591Managed by TOWNSHIPTOWN OF BIRCHWOODRamp surface: Concrete PlankADA-accessible feature: NoVerified 2026-07-12
Boat launchLong Lake Access45.69120, -91.72590Managed by TOWNSHIPTOWN OF LONG LAKERamp surface: ConcreteADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Northern PikeLargemouth BassPanfishWalleyeSmallmouth Bass
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2024, when 34,772 fish were recorded across 1 entry.
2024
WalleyeChippewa/St. Croix · Large Fingerling
34,7727.0 in average
2022
WalleyeMississippi Headwaters · Large Fingerling
34,7587.1 in average
2020
WalleyeMississippi Headwaters · Large Fingerling
35,6776.9 in average
2018
WalleyeMississippi Headwaters · Large Fingerling
34,6836.4 in average
2016
WalleyeMississippi Headwaters · Large Fingerling
34,1217.5 in average
2014
WalleyeMississippi Headwaters · Large Fingerling
34,7796.4 in average
2011
WalleyeMississippi Headwaters · Small Fingerling
115,4431.7 in average
2010
WalleyeMississippi Headwaters · Fry
2,600,0000.5 in average
Depth FAQ
How deep is Long Lake?
Long Lake is 74 feet deep at its deepest point and averages about 26 feet, according to Wisconsin DNR records.
Is there a free depth map of Long Lake?
Yes. LakeList publishes a free interactive depth contour map of Long 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 Long 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
Keep exploring