Pike Lake
Marathon County, Wisconsin204 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Pike Lake. Here is what has been measured.
- Eutrophic
- 2 aquatic invasives
- 34 ft max depth
- Public access
Pike Lake in Marathon County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 29.3 µg/L. Maximum depth: 34 ft. Surface area: 204 acres.
Wisconsin DNR rates Panfish as abundant on Pike Lake. DNR survey details →
Pike Lake is a 204-acre productive, nutrient-rich eutrophic lake in Marathon County, Wisconsin with a maximum depth of 34 feet. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 3 other monitored lakes in Marathon County, Pike Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-07. Methodology: how these readings are compared.
What Pike Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing4 species recorded
- Deep water34 ft surveyed max depth
Swimming conditions
Readings onlyModerate 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 Pike 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 Pike Lake
These are the measurements Wisconsin DNR publishes for Pike 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 5 ft. Phosphorus 29.3 µg/L. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 29.3µg/L | Fair 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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Pike Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Pike Lake typically sits around 64°F at the surface in September. Summer average is about 76°F. Usually warmest in Jul (about 78°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 (78°F).
Typical surface water temperature by month, from 14 field readings (2024–2025) via the EPA Water Quality Portal. See the full Pike Lake water temperature breakdown →
Wisconsin DNR rates Panfish as abundant on Pike Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Pike Lake’s water-quality measurements separately, and the water-quality trend over 6 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. 1 station on file (most recent sample 2026).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Pike Lake covering fish populations, stocking, water quality, and management. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Pike Lake comprehensive survey 2021Comprehensive Survey · WI DNR (PDF)
Lake Details
Max depth
34 ft
Surface area
204 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.1 mi
HydroLAKES / HydroSHEDS
Elevation
1,234 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Pike 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 Pike Lake
Compare lakeside cabins, hotels, and vacation rentals near Pike Lake in Marathon 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 Pike 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 Pike Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Pike 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 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Stable+0.1 µg/L/yr6 years
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Pike Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Hatley Wastewater Treatment FacilityHatley · 4.9 mi away · NPDES WI0036803Recent violation
- Ostrowski Farms, Inc.Elderon, Town Of · 4.3 mi away · NPDES WI0062367
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Marathon County
Frequently asked questions about Pike Lake
Where is Pike Lake?
- Pike Lake is a lake in Marathon County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Pike Lake?
- Pike Lake in Marathon County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 29.3 µg/L. Maximum depth: 34 ft. Surface area: 204 acres.
Is Pike 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 Pike Lake?
- Pike Lake typically sits around 64°F at the surface in September, from 14 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Pike Lake?
- Pike Lake has a maximum depth of 34 feet. The lake covers 204 acres.
What fish are in Pike Lake?
- Fish species found in Pike Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Pike Lake is located in Marathon County, Wisconsin.
What did the DNR fisheries survey find at Pike Lake?
- Wisconsin DNR rates Panfish as abundant on Pike Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Pike Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Pike Lake?
- Pike Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pike Lake. Public access is listed as yes.
Can I fish at Pike Lake?
- Pike 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 Pike 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 Marathon County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Wisconsin River Watershed, ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
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State Parks Near Pike Lake
Other Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Where this data comes from
76 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_WQX76 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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
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