Ashegon Lake
Ashegon Lake in Sawyer County, Wisconsin has a water quality grade of A (Excellent). Water clarity: 10.5 ft visibility. Phosphorus: 18 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Maximum depth: 56 ft. Surface area: 75 acres.
- Clarity
- 10.5 ft
- Max depth
- 56 ft
- Area
- 75 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Sawyer County
Ashegon Lake is a 75-acre mesotrophic lake in Sawyer County, Wisconsin with a maximum depth of 56 feet. Water quality is graded A based on 2 sampling years through 2024. 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 1 public boat landing. Compared to the 44 other monitored lakes in Sawyer County, Ashegon Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-09-03. Grade methodology: LakeGrade methodology.
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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.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Good clarity, visible to about 10.5 ft. Phosphorus level: 18 µg/L. Chlorophyll-a: 2.7 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 ft | Not graded |
| Phosphorus | 18 µg/L | Good |
| Chlorophyll-a (Algae) | 2.7 µg/L | Good |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Ashegon Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 56 ft |
| Surface Area | 75 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Ashegon LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Ashegon 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.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages.
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.97 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.8 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -1.02 µg/L/yr | 5 |
County Ranking
Ranked #8 of 45 lakes in Sawyer County
Nearby Lakes in Sawyer County
Frequently asked questions about Ashegon Lake
What is the water quality grade for Ashegon Lake?
- Ashegon Lake in Sawyer County, Wisconsin has a water quality grade of A (Excellent). Water clarity: 10.5 ft visibility. Phosphorus: 18 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Maximum depth: 56 ft. Surface area: 75 acres.
Is Ashegon Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Ashegon Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 2.7 µg/L. Always check local health department advisories before swimming.
How deep is Ashegon Lake?
- Ashegon Lake has a maximum depth of 56 feet. The lake covers 75 acres.
What fish are in Ashegon Lake?
- Fish species found in Ashegon Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Trout, Walleye. Ashegon Lake is located in Sawyer County, Wisconsin.
Are there boat ramps on Ashegon Lake?
- Ashegon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Ashegon Lake. Public access is listed as yes.
Explore Ashegon Lake across LakeGrade
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Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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Where this data comes from
70 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Lac Courte Oreilles (Tribal)
LCOWIS_WQX70 samples · 2020–2024
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P F ~ Phosphorus in Water by Colorimetry Automated Ascorbic Acid Method
- 2320 B ~ Alkalinity by Gran Titration
- 4500 P E ~ Phosphorus by Ascorbic Acid
- 10200 H ~ Chlorophyll a-b-c Determination
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