Maiden Lake
Oconto County, Wisconsin269 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Maiden Lake. Here is what has been measured.
- Oligotrophic
- 2 aquatic invasives
- 52 ft max depth
- Public access
Maiden Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 23 ft visibility. Phosphorus: 10 µg/L. Maximum depth: 52 ft. Surface area: 269 acres.
Wisconsin DNR lists Smallmouth Bass as common on Maiden Lake. DNR survey details →
Maiden Lake is a 269-acre cold, clear oligotrophic lake in Oconto County, Wisconsin with a maximum depth of 52 feet. Water clarity is improving over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available with 1 public boat landing. Compared to the 38 other monitored lakes in Oconto County, Maiden Lake ranks #28 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-26. Methodology: how these readings are compared.
Maiden Lake covers about 270 acres in Oconto County. It has one public boat landing. If you are planning to stay, you can search lake houses and cabins around Maiden Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Maiden Lake is good for
From access and monitoring records, not editorial picks.
- Clear water23 ft of visibility
- Boat launch1 documented ramp
- Fishing4 species recorded
- Deep water52 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Maiden Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Maiden Lake
These are the measurements Wisconsin DNR publishes for Maiden Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 23 ft down. Phosphorus 10 µg/L. TSI 35.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 23ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 35 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Maiden Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Maiden Lake typically sits around 63°F at the surface in October. Summer average is about 71°F. Usually warmest in Jul (about 75°F) and coldest in Feb (about 33°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (33°F) to its warmest (75°F).
Typical surface water temperature by month, from 36 field readings (2024–2026) via the EPA Water Quality Portal. See the full Maiden Lake water temperature breakdown →
Wisconsin DNR lists Smallmouth Bass as common on Maiden Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Maiden Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1995. 2 stations on file (most recent sample 2026).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Maiden Lake covering fish populations, stocking, water quality, and management. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2022Maiden Lake comprehensive summary report, 2022Comprehensive Survey · WI DNR · 2022 (PDF)
- 2014Maiden Lake comprehensive fishery survey 2014Comprehensive Survey · WI DNR · 2014 (PDF)
Lake Details
Max depth
52 ft
Surface area
269 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Shoreline
4.8 mi
HydroLAKES / HydroSHEDS
Elevation
1,201 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Maiden LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Maiden Lake
Compare lakeside cabins, hotels, and vacation rentals near Maiden Lake in Oconto County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Maiden Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Follow Maiden Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fish Species
Click a species to see every lake where it is documented.
Fishing Maiden Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Stable
Based on 7 years of monitoring (2020–2026).
Water clarity
Improving5 years
Phosphorus
Worsening+3.67 µg/L/yr5 years
Nearby Lakes in Oconto County
Frequently asked questions about Maiden Lake
Where is Maiden Lake?
- Maiden Lake is a lake in Oconto County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Maiden Lake?
- Maiden Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 23 ft visibility. Phosphorus: 10 µg/L. Maximum depth: 52 ft. Surface area: 269 acres.
Is Maiden Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Maiden Lake?
- Maiden Lake typically sits around 63°F at the surface in October, from 36 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Maiden Lake?
- Maiden Lake has a maximum depth of 52 feet. The lake covers 269 acres.
What fish are in Maiden Lake?
- Fish species found in Maiden Lake include Panfish, Largemouth Bass, Smallmouth Bass, Walleye. Maiden Lake is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Maiden Lake?
- Wisconsin DNR lists Smallmouth Bass as common on Maiden Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Maiden Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Maiden Lake?
- Maiden Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Maiden Lake. Public access is listed as yes.
Can I fish at Maiden Lake?
- Maiden Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Maiden Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Oconto County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its readings
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
State Parks Near Maiden Lake
Other Lakes in Wisconsin
Oligotrophic Lakes in Wisconsin
Where this data comes from
58 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX58 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
- Turbidity in Water
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory