Deer Lake
Wright County, MinnesotaLimited DataEutrophic
On the scoring rubric Deer Lake grades a D: clarity at 5.0 ft and phosphorus readings still being added keep it in the lower bracket for Wright County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.
A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. Deer Lake reaches 27 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. The lake's 171 acres and 2.1 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Deer Lake sits at rank 38 of 64 in Wright County, in the lower half of the local distribution.
Deer Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Walleye are documented at Deer Lake, one of 17 fish species on record for the lake. Public access is available — the lake is on the Minnesota PCA public-access list. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-04. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 5 ft. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 27 ft |
| Average Depth | 9 ft |
| Surface Area | 171.06 acres |
| Shoreline Length | 2.1 mi |
| Littoral Zone | 74% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Deer Lake (14-day solunar calendar)
→ Is it safe to eat fish from Deer Lake? (mercury & PFAS guide)
→ Deer Lake fishing regulations (limits, seasons, special rules)
Invasive Species
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.061 m/yr | 5 |
Location
County Ranking
Ranked #38 of 64 lakes in Wright County
Nearby Lakes in Wright County
More Minnesota Lake Rankings
State Parks Near Deer Lake
Other Grade D Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
5 surveys on file from MN DNR Fisheries. Most recent: 2023-08-14 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Bullhead | 102.28 | 0.34 lb |
| Yellow Perch | 23.90 | 0.15 lb |
| Black Crappie | 17.05 | 0.31 lb |
| Largemouth Bass | 16.46 | 1.05 lb |
| Bluegill | 11.17 | 0.25 lb |
| Pumpkinseed | 7.81 | 0.11 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Black Bullhead
Yellow Perch
Black Crappie
Largemouth Bass
From the 2023-08-14 survey
Deer Lake is located south of the city of Buffalo in Wright County. The lake is 163 acres and has a maximum depth of 27 feet. Deer Lake has a large watershed with land use dominated by agriculture, development, and pasture. A public access is located on the south end near the outlet. Mill Creek flows through Buffalo…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Deer Lake. 2 reports on file.
- —Fisheries Lake Survey — DeerFisheries Lake Survey · MN DNR LakeFinder
- —Public Water Access Sites — DeerPublic Water Access Sites · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Most recent sample: 2024-10-04
Monitoring stations: 1