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D

Crow Wing Lake

Crow Wing County, MinnesotaLimited DataEutrophic

Crow Wing Lake earns a D — measurements through 2022 show persistent nutrient pressure that limits clarity through the summer.

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. Crow Wing Lake reaches 26 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 379 acres, Crow Wing Lake fits the Minnesota median for monitored lakes, with 3.9 miles of shoreline. Within the 120 graded lakes of Crow Wing County, Crow Wing Lake sits at rank 118, near the bottom of the county list.

No invasive species are currently listed at Crow Wing Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye among the lake's 15 documented species — a notable draw for Minnesota anglers. A documented public access point at Crow Wing Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been logged at Crow Wing Lake more than two dozen times, putting the median around Apr 14 — a useful baseline for tracking climate trends. 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 2022-09-02. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 6 ft. Trophic State Index: 51.

MetricValueGrade
Water Clarity (Secchi Depth)6 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)51Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth26 ft
Average Depth11 ft
Surface Area378.93 acres
Shoreline Length3.9 mi
Littoral Zone55%
Public AccessYes

Fish Species

black bullhead,black crappie,bluegill,bowfin (dogfish),brown bullhead,common carp,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,rock bass,walleye,white sucker,yellow bullhead,yellow perch

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

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

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

Crow Wing Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Improving

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.61 m/yr2

Ice Season

Historical ice data from Minnesota DNR (82 observations).

Typical Ice-Out
Apr 14
Typical Ice-In
Nov 15

Estimated open water season: 215 days

EarliestLatest
Ice-Out2016-03-20 (2016)1975-04-30 (1975)
Ice-In1977-10-12 (1977)1998-12-08 (1998)

Most recent ice-out: 2022-04-28

Location

Loading map…

County Ranking

Ranked #118 of 120 lakes in Crow Wing County

Cleaner Lakes Within 30 Miles

Crow Wing Lake holds Grade D. 3 nearby lakes hold higher grades.

Nearby Lakes in Crow Wing County

DNR Fisheries Survey Summary

10 surveys on file from MN DNR Fisheries. Most recent: 2025-09-02 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill42.880.13 lb
Spottail Shiner37.39
SUN33.04
Yellow Perch31.930.1 lb
Largemouth Bass16.171.45 lb
Bluntnose Minnow15.25

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

177 fish · 38 in · 2025-09-02
67340345678

Yellow Perch

5 fish · 58 in · 2025-09-02
3205678

Largemouth Bass

6 fish · 518 in · 2025-09-02
32056789101112131415161718

From the 2025-09-02 survey

A targeted survey of nearshore fish species in Crow Wing Lake was conducted on September 2-3, 2025, by Lake Biological Monitoring and Assessment (LBMA) program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing and seining with a 50-foot or 15-foot seine, where…

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 Crow Wing Lake. 4 reports on file.

EPA Impairment Status

Crow Wing Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Impaired biota (cause unknown)MercuryNutrients (phosphorus, nitrogen)

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

Source: EPA ATTAINS assessment unit MN18-0155-00 · Official waterbody report

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: 2022-09-02

Monitoring stations: 4