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Iola Lake
Enhanced dataInteractive depth contours
Iola LakeWaupaca 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 9-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 Iola Lake.
Start here
Fishing forecast
Best windows for Iola 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
Iola Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
78°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 date unknown
Individual readings are not retained for this lake — the index below is what the monitoring record summarizes.
41 five-year summer trophic state index · Mesotrophic. Moderately clear with moderate nutrients — a typical profile for good swimming lakes.
Frogner Island, Iola MillpondStation 10059483 · TSI based on chlorophyll
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
Iola Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Iola 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 278800 · 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 2017 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 contextIola Lake (WBIC 278800) only
Human-reviewed 2017 electrofishing metrics for Iola Lake (Iola Millpond).
- 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.
Black Bullhead
3 fish2017 electrofishing catch count · p. 30
Black Crappie
9 fish2017 electrofishing catch count · p. 307 inches2017 mean length · p. 304.6 inches2017 min length · p. 3013.8 inches2017 max length · p. 30
Bluegill
209 fish2017 electrofishing catch count · p. 305.9 inches2017 mean length · p. 301.6 inches2017 min length · p. 309.4 inches2017 max length · p. 30
Golden Shiner
7 fish2017 electrofishing catch count · p. 30
Lake Chubsucker
116 fish2017 electrofishing catch count · p. 30
Largemouth Bass
41 fish2017 electrofishing catch count · p. 309.5 inches2017 mean length · p. 302.8 inches2017 min length · p. 3020.2 inches2017 max length · p. 30
Northern Pike
4 fish2017 electrofishing catch count · p. 3017.3 inches2017 mean length · p. 3012.2 inches2017 min length · p. 3021.1 inches2017 max length · p. 30
Pumpkinseed
35 fish2017 electrofishing catch count · p. 305.2 inches2017 mean length · p. 302.3 inches2017 min length · p. 307.6 inches2017 max length · p. 30
Rock Bass
5 fish2017 electrofishing catch count · p. 30
White Sucker
9 fish2017 electrofishing catch count · p. 30
Yellow Bullhead
15 fish2017 electrofishing catch count · p. 30
Yellow Perch
15 fish2017 electrofishing catch count · p. 305.9 inches2017 mean length · p. 304.1 inches2017 min length · p. 307.1 inches2017 max length · p. 30
Iola Lake comprehensive survey, 2017Matched by exact wbic name county · WBICs 278800 · verified 2026-07-20Wisconsin DNR fisheries report; LakeList operator documented permission to leverage this public report with source attribution.
220surface acres
9max depth feet
1public access points
44.5222, -89.1323latitude, longitude
Access
Public access points
Boat launchOlson Park Boat Ramp44.51070, -89.12570Managed by VILLAGEVILLAGE OF IOLARamp surface: Concrete PlankADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
PanfishLargemouth BassNorthern Pike
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2018, when 661 fish were recorded across 1 entry.
2018
Yellow PerchUnspecified · Large Fingerling
6615.0 in average
2016
BluegillUnspecified · Large Fingerling
18,9250.5 in average
2015
Largemouth BassUnspecified · Large Fingerling
11,0121.9 in average
2014
Largemouth BassUnspecified · Large Fingerling
5,1253.2 in average
2014
Northern PikeMud Lake - Madison Chain Of Lakes · Small Fingerling
15,4422.7 in average
2013
Largemouth BassUnspecified · Large Fingerling
5,1482.1 in average
2013
Northern PikeMud Lake - Madison Chain Of Lakes · Small Fingerling
15,4514.5 in average
Depth FAQ
How deep is Iola Lake?
Iola Lake is 9 feet deep at its deepest point and averages about 3 feet, according to Wisconsin DNR records.
Is there a free depth map of Iola Lake?
Yes. LakeList publishes a free interactive depth contour map of Iola Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Iola 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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