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Hunter Lake

Cass County, MinnesotaOligotrophic

On the LakeGrade rubric, Hunter Lake pulls an A: clarity at 31.0 ft and 11 µg/L of phosphorus put it in the top bracket for Minnesota. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Trophically, Hunter Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. Hunter Lake reaches 48 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 182 acres, Hunter Lake fits the Minnesota median for monitored lakes, with 2.6 miles of shoreline. Among the 132 graded lakes in Cass County, Hunter Lake ranks 24 — in the top quartile locally.

Hunter Lake has no invasive species recorded in Minnesota state databases as of 2023, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Hunter Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Hunter Lake — most use is by shoreline residents and their guests. The lake has a partial ice record — 11 observed ice-outs, centered near Apr 22. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-17. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 31 ft down. Phosphorus level: 11 µg/L. Trophic State Index: 33.

MetricValueGrade
Water Clarity (Secchi Depth)31 ftA
Phosphorus11 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)33Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth48 ft
Surface Area181.82 acres
Shoreline Length2.6 mi
Littoral Zone29%
Public AccessNo

Water Quality Trend: Declining

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-1.446 m/yr5
Phosphorus Stable+0.2 µg/L/yr5
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (21 observations).

Typical Ice-Out
Apr 22
Typical Ice-In
Dec 1

Estimated open water season: 223 days

EarliestLatest
Ice-Out2000-04-05 (2000)2022-05-08 (2022)
Ice-In2014-11-12 (2014)2021-12-26 (2021)

Most recent ice-out: 2022-05-08

Location

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County Ranking

Ranked #24 of 132 lakes in Cass County

Nearby Lakes in Cass County

DNR Fisheries Survey Summary

3 surveys on file from MN DNR Fisheries. Most recent: 1987-08-31 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill11.120.17 lb
Rock Bass8.060.31 lb
Yellow Perch4.250.27 lb
White Sucker4.252.51 lb
Smallmouth Bass3.601.02 lb
Northern Pike1.255.9 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

From the 1987-08-31 survey

Numbers/Set (Lbs./fish) NOP BLG SMB LMB WAE1987 1.0(9.7) 6.1(0.19) 8.7(1.8) 1.3(0.72) 1.7(5.4)1969 1.5(2.1) 36.0(0.20) 1.5(0.73) 1.5(0.48) 1.0(10.5)Northern Pike - Gillnet catches indicate a low population of large fish. No year classes beyond 1979 were present indicating limited natural reproduction.Bluegill -…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Hunter Lake. 1 report on file.

EPA Impairment Status

Hunter Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN11-0171-02 · Official waterbody report · Matched by proximity (2.28 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2023-09-17

Monitoring stations: 2