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.
Track Crow Wing Lake
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 26 ft |
| Average Depth | 11 ft |
| Surface Area | 378.93 acres |
| Shoreline Length | 3.9 mi |
| Littoral Zone | 55% |
| Public Access | Yes |
Fish Species
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).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.61 m/yr | 2 |
Ice Season
Historical ice data from Minnesota DNR (82 observations).
Estimated open water season: 215 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2016-03-20 (2016) | 1975-04-30 (1975) |
| Ice-In | 1977-10-12 (1977) | 1998-12-08 (1998) |
Most recent ice-out: 2022-04-28
Location
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
More Minnesota Lake Rankings
State Parks Near Crow Wing Lake
Other Grade D Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
10 surveys on file from MN DNR Fisheries. Most recent: 2025-09-02 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 42.88 | 0.13 lb |
| Spottail Shiner | 37.39 | — |
| SUN | 33.04 | — |
| Yellow Perch | 31.93 | 0.1 lb |
| Largemouth Bass | 16.17 | 1.45 lb |
| Bluntnose Minnow | 15.25 | — |
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
Yellow Perch
Largemouth Bass
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…
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.
- —Fisheries Lake Survey — Crow WingFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Crow Wing (0203)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — Crow WingFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — Crow WingPublic Water Access Sites · MN DNR LakeFinder
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
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