Maiden Lake
Maiden Lake in Oconto County, Wisconsin has a water quality grade of B (Good). 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 →
- Clarity
- 23 ft
- Typical in August
- 73°F
- Max depth
- 52 ft
- Area
- 269 acres
- Type
- Oligotrophic
- Trend
- → Stable
- Public access
- Yes
Next lake in Oconto County
Swipe left or right on this bar to open the next or previous lake.
Maiden Lake is a 269-acre cold, clear oligotrophic lake in Oconto County, Wisconsin with a maximum depth of 52 feet. Water quality is graded B based on 1 sampling years through 2026. 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 2 public boat landings. 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. Grade methodology: LakeQuality methodology.
Watch Maiden Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Crystal clear, you can see 23 ft down. Phosphorus level: 10 µg/L. Trophic State Index: 35.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 23 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay 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
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 →
Water Temperature
Maiden Lake typically sits around 73°F at the surface in August. 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.
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 a water-quality grade. LakeQuality grades Maiden Lake B from EPA Water Quality Portal chemistry, 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
| Characteristic | Value |
|---|---|
| Maximum Depth | 52 ft |
| Surface Area | 269 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Maiden LakePublic
- Little Gillett LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded 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 data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.65 m/yr | 5 |
| Phosphorus | ↓ Declining | +3.67 µg/L/yr | 5 |
County Ranking
Ranked #28 of 39 lakes in Oconto County
Nearby Lakes in Oconto County
Frequently asked questions about Maiden Lake
Where is Maiden Lake?
- Maiden Lake is a lake in Oconto County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Maiden Lake?
- Maiden Lake in Oconto County, Wisconsin has a water quality grade of B (Good). Water clarity: 23 ft visibility. Phosphorus: 10 µg/L. Maximum depth: 52 ft. Surface area: 269 acres.
Is Maiden Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Maiden Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Maiden Lake?
- Maiden Lake typically sits around 73°F at the surface in August, 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 a water-quality grade. LakeQuality grades Maiden Lake B from EPA Water Quality Portal chemistry, 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 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Maiden Lake, Little Gillett Lake. Public access is listed as yes.
Explore Maiden Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and top-graded 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 grade
Low nutrients, clear water, excellent for swimming
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
State Parks Near Maiden Lake
Other Grade B 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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated 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