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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 17 ft |
| Surface Area | 304.37 acres |
| Shoreline Length | 4.9 mi |
| Littoral Zone | 104% |
| Public Access | Yes |
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).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.214 m/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (6 observations).
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2015-04-05 (2015) | 2013-05-09 (2013) |
| Ice-In | 2015-11-22 (2015) | 2021-11-25 (2021) |
Most recent ice-out: 2022-04-30
Location
County Ranking
Ranked #39 of 53 lakes in Aitkin County
Nearby Lakes in Aitkin County
More Minnesota Lake Rankings
State Parks Near Blind Lake
Other Grade D Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
6 surveys on file from MN DNR Fisheries. Most recent: 2026-03-05 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 22.19 | 0.27 lb |
| CNM | 17.09 | — |
| Yellow Perch | 10.53 | 0.19 lb |
| Black Crappie | 8.19 | 0.27 lb |
| Black Bullhead | 8.07 | 0.68 lb |
| Largemouth Bass | 7.45 | 0.83 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
Yellow Perch
Black Crappie
Black Bullhead
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…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Blind Lake. 3 reports on file.
- —Fisheries Lake Survey — BlindFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Blind (0011)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — BlindPublic 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
Ice data from Minnesota DNR Climate
Most recent sample: 2024-09-01
Monitoring stations: 1