Fawn Lake
Cass County, Minnesota46 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Fawn Lake. Here is what has been measured.
- 29 ft max depth
- Public access
- Limited data
Fawn Lake in Cass County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 20 ft visibility. Maximum depth: 29 ft. Surface area: 46.35 acres.
Minnesota DNR's Standard Survey on July 19, 1967 caught 0.50 walleye per gill net at Fawn Lake. DNR survey details →
Fawn Lake is a 46-acre lake in Cass County, Minnesota with a maximum depth of 29 feet. Phosphorus level is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-08-29. Methodology: how these readings are compared.
What Fawn Lake is good for
From access and monitoring records, not editorial picks.
- Clear water20 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Fawn Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Fawn Lake
These are the measurements Minnesota PCA publishes for Fawn Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 20 ft down. TSI 34.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 20ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| 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. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Fawn Lake
Answers come straight from the public measurements and survey records on this page.
Minnesota DNR's Standard Survey on July 19, 1967 caught 0.50 walleye per gill net at Fawn Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Fawn 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.
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1967-07-19 (Standard Survey).
1 survey on file · most recent 1967-07-19 (Standard Survey)
59 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Bluegill | 91.17 | 0.13 lb | |
| Rock Bass | 8.84 | 0.23 lb | |
| Yellow Perch | 4.83 | 0.2 lb | |
| Northern Pike | 3.33 | 1.13 lb | |
| Largemouth Bass | 2.67 | 0.93 lb | |
| Walleye | 0.58 | 3.1 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
From the 1967-07-19 survey
DISCUSSION AND SUMMARY:FAWN LAKE HAS NO INLETS OR OUTLETS. SHOAL WATER SOILS ARE 45% SAND, 45% GRAVEL AND 10% MUCK. SEVERAL EMERGENT AND SUBMERGED AQUATIC PLANTS WERE FOUND; MOST OF THE AQUATIC PLANTS HAD A SPARSE OR SCATTERED DENSITY RATING, EXCEPT FOR MUSKGRASS AND BUSHY PONDWEED.TESTNETTING INDICATED A GOOD FISH…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Fawn Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — FawnFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
29 ft
Surface area
46 acres
Shoreline
1.3 mi
Littoral zone
53%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,322 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Fawn Lake
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Fishing Fawn Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Worsening+7 µg/L/yr2 years
Chlorophyll-a
Improving-0.8 µg/L/yr2 years
Nearby Lakes in Cass County
Frequently asked questions about Fawn Lake
Where is Fawn Lake?
- Fawn Lake is a lake in Cass County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Fawn Lake?
- Fawn Lake in Cass County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 20 ft visibility. Maximum depth: 29 ft. Surface area: 46.35 acres.
Is Fawn Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Fawn Lake?
- Fawn Lake has a maximum depth of 29 feet. The lake covers 46.35 acres.
What did the DNR fisheries survey find at Fawn Lake?
- Minnesota DNR's Standard Survey on July 19, 1967 caught 0.50 walleye per gill net at Fawn Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Fawn 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.
Can I fish at Fawn Lake?
- Public access to Fawn Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
15 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA15 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder