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LakeQuality
D

Blind Lake

Aitkin County, MinnesotaLimited DataEutrophic

Blind Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

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. The lake bottoms out at 17 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Blind Lake covers 304 acres alongside 4.9 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within Aitkin County's 53 graded lakes, Blind Lake ranks 39 — below the local median, though not at the bottom.

Blind Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery is bass-led, with 12 documented species across the lake's records. Public access is available — the lake is on the Minnesota PCA public-access list. 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 2024-09-01. 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 5.5 ft. Trophic State Index: 53.

MetricValueGrade
Water Clarity (Secchi Depth)5.5 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)53Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth17 ft
Surface Area304.37 acres
Shoreline Length4.9 mi
Littoral Zone104%
Public AccessYes

Fish Species

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Blind Lake (14-day solunar calendar)

→ Is it safe to eat fish from Blind Lake? (mercury & PFAS guide)

Blind Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.214 m/yr5

Ice Season

Historical ice data from Minnesota DNR (6 observations).

Typical Ice-Out
Apr 27
EarliestLatest
Ice-Out2015-04-05 (2015)2013-05-09 (2013)
Ice-In2015-11-22 (2015)2021-11-25 (2021)

Most recent ice-out: 2022-04-30

Location

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County Ranking

Ranked #39 of 53 lakes in Aitkin County

Nearby Lakes in Aitkin County

DNR Fisheries Survey Summary

6 surveys on file from MN DNR Fisheries. Most recent: 2026-03-05 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill22.190.27 lb
CNM17.09
Yellow Perch10.530.19 lb
Black Crappie8.190.27 lb
Black Bullhead8.070.68 lb
Largemouth Bass7.450.83 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.

Bluegill

129 fish · 79 in · 2025-05-07
87440trophy 10789

Yellow Perch

98 fish · 48 in · 2018-06-18
6332045678

Black Crappie

39 fish · 412 in · 2025-05-07
21110trophy 10456789101112

Black Bullhead

5 fish · 614 in · 2018-06-18
21067891011121314

From the 2026-03-05 survey

This survey was conducted on 3/5/2026 to gauge the likelihood of a winterkill occurring on Blind Lake. Winter dissolved oxygen levels were good for Blind Lake and likely tolerable based on this survey with 5.9 ppm below the ice and 1.3 ppm near the bottom. Therefore, it seemed unlikely for any significant winterkill…

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 Blind Lake. 3 reports on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2024-09-01

Monitoring stations: 1