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Trego Lake
Enhanced dataInteractive depth contours
Trego 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 61% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 36-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 Trego Lake.
Start here
Fishing forecast
Best windows for Trego 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
Trego 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
Historical volunteer-monitoring record for this lake.
Last sampled Apr 2025Volunteer monitoring 2003–2025
DNR volunteers monitored this lake for about 22 years, ending in 2025. Its final monitored summers showed slight haze water (~8.3 ft Secchi) in 2012, elevated algae (chlorophyll ~10.5 µg/L) in 2011, and elevated nutrients (phosphorus ~37 µg/L) in 2011. After 1 year without samples, these readings describe the lake as it was, not as it is.
The DNR station record reports activity through 2026, but LakeList holds no readings after 2025 — check the station reports for anything newer.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2012 | 8.3 ft (3) | 9.0 µg/L (1) | 25.0 µg/L (1) |
| 2011 | 5.3 ft (3) | 10.5 µg/L (2) | 37.0 µg/L (2) |
| 2010 | 8.5 ft (2) | 4.0 µg/L (1) | 20.0 µg/L (1) |
| 2009 | 8.1 ft (4) | 6.5 µg/L (2) | 26.0 µg/L (2) |
| 2008 | 6.9 ft (4) | 6.0 µg/L (2) | 27.0 µg/L (2) |
| 2007 | 11.9 ft (5) | 5.0 µg/L (1) | 20.0 µg/L (1) |
Trego Lake - Deep Hole Near DamStation 663162
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 maps4 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
Trego Lake depth maps
4 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Trego 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 2712000 · 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 Trego Lake. Exact catch locations and angler details are not shown.
Most reported species in this extract
Yellow perch1Redear sunfish1Northern pike1Walleye1Largemouth bass1Smallmouth bass1
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
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May
Jun
Jul
Aug
Sep
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Dec
All fish by monthTotal public catch reports across every listed species.
Jan
Feb
Mar
Apr
May
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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 Fishbrain383surface acres
36max depth feet
1public access points
45.9332, -91.8798latitude, longitude
Access
Public access points
Boat launchTrego Landing - North Access45.92153, -91.86821Managed by TOWNSHIPTOWN OF TREGORamp surface: Concrete PanelsADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
PanfishLargemouth BassNorthern PikeSmallmouth BassWalleyeMuskySturgeon
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2022, when 189 fish were recorded across 1 entry.
2022
MuskellungeUpper Chippewa River · Large Fingerling
18911.9 in average
2019
Lake SturgeonYellow River · Large Fingerling
3838.5 in average
2018
MuskellungeUpper Chippewa River · Large Fingerling
10812.2 in average
2017
Lake SturgeonYellow River · Large Fingerling
1,3758.5 in average
2016
MuskellungeUpper Chippewa River · Large Fingerling
14212.0 in average
2015
Lake SturgeonYellow River · Large Fingerling
19510.3 in average
2014
MuskellungeUpper Chippewa River · Large Fingerling
13511.0 in average
2013
Lake SturgeonYellow River · Large Fingerling
1588.6 in average
2012
Lake SturgeonYellow River · Large Fingerling
2258.3 in average
2012
MuskellungeUpper Chippewa River · Large Fingerling
22512.6 in average
2011
Lake SturgeonYellow River · Large Fingerling
4787.5 in average
2011
WalleyeMississippi Headwaters · Small Fingerling
16,1321.6 in average
Showing the 12 most recent records from 14 published entries.
Depth FAQ
How deep is Trego Lake?
Trego Lake is 36 feet deep at its deepest point and averages about 11 feet, according to Wisconsin DNR records.
Is there a free depth map of Trego Lake?
Yes. LakeList publishes a free interactive depth contour map of Trego 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 Trego 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
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