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Rost Lake
Enhanced dataInteractive depth contours
Rost LakeOconto County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Modeled depth estimate · Not a survey · Not for navigation
Source: LakeList depth modelmedium confidence · QA passed · Select a contour to inspect its mapped depthModeled depth estimate: contours computed from the lake's shoreline shape and its documented 29-ft maximum depth (depth grows with distance from shore, calibrated to the documented mean depth where available). This is a smooth mathematical model, not a survey - real holes, bars, and drop-offs will differ. Community sonar (C-MAP Genesis) overlays where recorded. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Rost Lake.
Start here
Fishing forecast
Best windows for Rost 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
Rost Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
75°FPeak summer
Seasonal estimate. Checking current National Weather Service air temperatures…
Warmest water of the year. Fish hold deeper or feed in low light; swimming and watersports are at their best.
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 Jul 2018Volunteer monitoring 1976–2018
DNR volunteers monitored this lake for about 42 years, ending in 2018. Its final monitored summers showed clear water (~13 ft Secchi) in 2016, low algae (chlorophyll ~4 µg/L) in 2016, and very low nutrients (phosphorus ~9 µg/L) in 2012. After 8 years without samples, these readings describe the lake as it was, not as it is.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2018 | 15.0 ft (1) | 2.0 µg/L (1) | — |
| 2016 | 13.0 ft (3) | 4.0 µg/L (2) | — |
| 2012 | 9.5 ft (2) | 4.0 µg/L (2) | 9.0 µg/L (2) |
| 2011 | 10.5 ft (2) | 4.5 µg/L (2) | 8.5 µg/L (2) |
| 2010 | — | 3.5 µg/L (2) | 9.5 µg/L (2) |
| 1996 | 6.5 ft (1) | — | — |
Rost Lake - Deepest PartStation 433061
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 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
Rost Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Rost 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 504300 · 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 2016 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 contextRost Lake (WBIC 504300) only
Human-reviewed 2016 fyke-net, electrofishing and northern-pike population metrics for Rost Lake.
- Historical survey snapshot; not current regulations or navigation guidance.
- Only explicit report observations and estimates were promoted; management targets, comparison-lake values and unsupported chart-only values were excluded.
- Metric source pages, survey years, methods, units and exact waterbody scope are retained.
All fish
603 fish including recaptures2016 fyke net catch count · p. 3
Black Crappie
63 fish2016 catch count · p. 30.7 fish/net-night2016 fyke net cpue · p. 311 fish/mile2016 electrofishing cpue · p. 3
Bluegill
240 fish2016 catch count · p. 32.8 fish/net-night2016 fyke net cpue · p. 331 fish/mile2016 electrofishing cpue · p. 37.3 inches2016 mean length · p. 3
Largemouth Bass
69 fish including recaptures2016 catch count · p. 41 fish2016 recapture count · p. 40.1 fish/net-night2016 fyke net cpue · p. 438 fish/mile2016 electrofishing cpue · p. 4
Northern Pike
127 fish including recaptures2016 catch count · p. 413 fish2016 recapture count · p. 41.9 fish/net-night2016 fyke net cpue · p. 43 percent2016 length share ge 21 · p. 4
Pumpkinseed
20 fish2016 catch count · p. 6
Walleye
1 fish2016 catch count · p. 6
Warmouth
5 fish2016 catch count · p. 6
Yellow Bullhead
75 fish2016 catch count · p. 6
Yellow Perch
3 fish2016 catch count · p. 6
Rost Lake comprehensive survey, 2016Matched by exact wbic name county · WBICs 504300 · verified 2026-07-20Wisconsin DNR fisheries report; LakeList operator documented permission to leverage this public 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 up to 3 hooks, baits, or lures, per angler.
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: May 2, 2026 to March 7, 2027. No minimum length limit 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. No minimum length limit and the daily bag limit is 5.
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.
99surface acres
29max depth feet
1public access points
45.0564, -88.1395latitude, longitude
Access
Public access points
Boat launchRost Lake Access45.05305, -88.14499Managed by TOWNSHIPTOWN OF BRAZEAURamp surface: GravelADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikePanfish
Depth FAQ
How deep is Rost Lake?
Rost Lake is 29 feet deep at its deepest point and averages about 10 feet, according to Wisconsin DNR records.
Is there a free depth map of Rost Lake?
Yes. LakeList publishes a free interactive depth contour map of Rost Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Rost Lake depth map come from?
The interactive depth contours are derived from LakeList depth model. Each contour set passes a visual QA review against the source document before it is published. The depths are a modeled estimate calibrated to the lake's documented maximum depth - not a survey, and 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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