Lake Mohawksin
Lincoln County, Wisconsin1,515 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Lake Mohawksin. Here is what has been measured.
- Eutrophic
- Impaired · Oxygen depletion (low DO)
- 3 aquatic invasives
- 25 ft max depth
- Public access
Lake Mohawksin in Lincoln County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 4 ft visibility. Phosphorus: 34.7 µg/L. Maximum depth: 25 ft. Surface area: 1515 acres.
Wisconsin DNR lists Northern Pike as common on Lake Mohawksin. DNR survey details →
Lake Mohawksin is a 1,515-acre productive, nutrient-rich eutrophic lake in Lincoln County, Wisconsin with a maximum depth of 25 feet. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 5 public boat landings. Compared to the 12 other monitored lakes in Lincoln County, Lake Mohawksin ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-05-02. Methodology: how these readings are compared.
Lake Mohawksin covers about 1,500 acres in Lincoln County. It has 5 public boat landings, so a lakefront rental is not the only way to get a boat on the water. For a place on the water, look through cabin and lake-house rentals near Lake Mohawksin on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Lake Mohawksin is good for
From access and monitoring records, not editorial picks.
- Boat launch5 documented ramps
- Fishing6 species recorded
- Big water1,515 acres
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. Lake Mohawksin is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), pFAS. Check local advisories before you swim.
Whether Lake Mohawksin 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 Lake Mohawksin
These are the measurements Wisconsin DNR publishes for Lake Mohawksin, 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 4 ft. Phosphorus 34.7 µg/L. TSI 56.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 34.7µg/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. | 56 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Mohawksin
Answers come straight from the public measurements and survey records on this page.
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Lake Mohawksin — clouds, ice, or an off-season gap in coverage. The most recent reading was high (147,231 cells/mL) on May 2, 2026.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Wisconsin DNR lists Northern Pike as common on Lake Mohawksin.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Mohawksin’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. 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 2006. 9 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
25 ft
Surface area
1,515 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
2,251 sq mi
HydroLAKES / HydroSHEDS
Shoreline
32.4 mi
HydroLAKES / HydroSHEDS
Elevation
1,427 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Bay Mill RoadPublic
- Deer Park RoadPublic
- Sara ParkPublic
- Bradley ParkPublic
- Mohawksin 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 Lake Mohawksin
Compare lakeside cabins, hotels, and vacation rentals near Lake Mohawksin in Lincoln 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 Lake Mohawksin
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 trip? Cabins and lodging at Lake Mohawksin → · more Wisconsin lake trips
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Fish Species
Click a species to see every lake where it is documented.
Fishing Lake Mohawksin
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: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Improving-1.07 µg/L/yr6 years
EPA Impairment Status
Lake Mohawksin 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: Aquatic life, Fish consumption.
Source: EPA ATTAINS assessment unit WI10007160 · Official waterbody report
Nearby Lakes in Lincoln County
Frequently asked questions about Lake Mohawksin
Where is Lake Mohawksin?
- Lake Mohawksin is a lake in Lincoln County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Lake Mohawksin?
- Lake Mohawksin in Lincoln County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 4 ft visibility. Phosphorus: 34.7 µg/L. Maximum depth: 25 ft. Surface area: 1515 acres.
Is Lake Mohawksin safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Mohawksin is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO), pFAS. Check local advisories before you swim.
How deep is Lake Mohawksin?
- Lake Mohawksin has a maximum depth of 25 feet. The lake covers 1515 acres.
What fish are in Lake Mohawksin?
- Fish species found in Lake Mohawksin include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Lake Mohawksin is located in Lincoln County, Wisconsin.
What did the DNR fisheries survey find at Lake Mohawksin?
- Wisconsin DNR lists Northern Pike as common on Lake Mohawksin. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Mohawksin’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Does Lake Mohawksin have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Lake Mohawksin (clouds, ice, or an off-season gap). The most recent reading was high (147,231 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Lake Mohawksin?
- Lake Mohawksin has 5 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Bay Mill Road, Deer Park Road, Sara Park, Bradley Park, among others. Public access is listed as yes.
Can I fish at Lake Mohawksin?
- Lake Mohawksin has 5 documented boat landings 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 Lake Mohawksin 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 Lincoln 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
More lakes in Wisconsin
State Parks Near Lake Mohawksin
Other Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Compare Lake Mohawksin With Nearby Lakes
Where this data comes from
47 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_WQX47 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
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