Pine Lake
Iron County, Wisconsin300 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Pine Lake. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
- 2 aquatic invasives
- 41 ft max depth
- Public access
Pine Lake in Iron County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6 ft visibility. Phosphorus: 17.8 µg/L. Maximum depth: 41 ft. Surface area: 300 acres.
Wisconsin DNR rates Walleye as abundant on Pine Lake. DNR survey details →
Pine Lake is a 300-acre mesotrophic lake in Iron County, Wisconsin with a maximum depth of 41 feet. Overall water quality is declining over recent sampling years. The lake supports 5 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 1 public boat landing. Compared to the 15 other monitored lakes in Iron County, Pine Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-30. Methodology: how these readings are compared.
Pine Lake covers about 300 acres in Iron County. It has one public boat landing. If you are planning to stay, you can search lake houses and cabins around Pine Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Pine Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing5 species recorded
- Deep water41 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. Pine Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Pine 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 Pine Lake
These are the measurements Wisconsin DNR publishes for Pine Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 6 ft. Phosphorus 17.8 µg/L. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 17.8µg/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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Pine Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Pine Lake typically sits around 73°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 76°F) and coldest in Apr (about 51°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (51°F) to its warmest (76°F).
Typical surface water temperature by month, from 16 field readings (2024–2025) via the EPA Water Quality Portal. See the full Pine Lake water temperature breakdown →
Wisconsin DNR rates Walleye as abundant on Pine Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Pine Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. 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 1993. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
41 ft
Surface area
300 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Pine 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 Pine Lake
Compare lakeside cabins, hotels, and vacation rentals near Pine Lake in Iron 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 Pine Lake
Prices for Oct 9–11, 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 Pine Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Pine 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: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Stable+0.06 µg/L/yr6 years
EPA Impairment Status
Pine Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit WI10008933 · Official waterbody report
Nearby Lakes in Iron County
Frequently asked questions about Pine Lake
Where is Pine Lake?
- Pine Lake is a lake in Iron County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Pine Lake?
- Pine Lake in Iron County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6 ft visibility. Phosphorus: 17.8 µg/L. Maximum depth: 41 ft. Surface area: 300 acres.
Is Pine Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Pine Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
What is the water temperature of Pine Lake?
- Pine Lake typically sits around 73°F at the surface in August, from 16 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Pine Lake?
- Pine Lake has a maximum depth of 41 feet. The lake covers 300 acres.
What fish are in Pine Lake?
- Fish species found in Pine Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Walleye. Pine Lake is located in Iron County, Wisconsin.
What did the DNR fisheries survey find at Pine Lake?
- Wisconsin DNR rates Walleye as abundant on Pine Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Pine Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Pine Lake?
- Pine Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pine Lake. Public access is listed as yes.
Can I fish at Pine Lake?
- Pine 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 Pine 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 Iron County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Northwoods Wisconsin area
Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Lake Superior Basin (MN+WI), ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
Other Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
48 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_WQX48 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
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
Impairment status from EPA ATTAINS 303(d) database
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory