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LakeQuality
D

Eagle Lake

Hennepin County, MinnesotaEutrophic

Eagle 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.

At a TSI of 63, Eagle Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. The lake bottoms out at 34 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 296 acres, Eagle Lake fits the Minnesota median for monitored lakes, with 5.1 miles of shoreline. Within Hennepin County's 95 graded lakes, Eagle Lake ranks 53 — below the local median, though not at the bottom.

Eurasian watermilfoil has been documented at Eagle Lake, requiring shoreline management to keep dense mats from crowding native vegetation. Eagle Lake's fishery is anchored by muskellunge, with 17 documented species in total — a destination water for muskie anglers. A documented public access point at Eagle Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been recorded 9 times at Eagle Lake, with a median around Mar 29. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-14. Grade methodology: LakeGrade methodology.

Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Very murky, less than 3 ft of visibility. Phosphorus level: 61.5 µg/L. Trophic State Index: 63.

MetricValueGrade
Water Clarity (Secchi Depth)3 ftF
Phosphorus61.5 µg/LD
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)63Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth34 ft
Average Depth10.7 ft
Surface Area296.2 acres
Shoreline Length5.1 mi
Littoral Zone67%
Public AccessYes

Fish Species

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

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

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

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

Invasive Species

Eurasian watermilfoil

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.074 m/yr5
Phosphorus Declining+6.93 µg/L/yr4
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (17 observations).

Typical Ice-Out
Mar 29
Typical Ice-In
Dec 2

Estimated open water season: 248 days

EarliestLatest
Ice-Out2024-03-04 (2024)2018-04-30 (2018)
Ice-In2018-11-13 (2018)2007-01-14 (2007)

Most recent ice-out: 2026-03-28

Location

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County Ranking

Ranked #53 of 95 lakes in Hennepin County

Cleaner Lakes Within 30 Miles

Eagle Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Hennepin County

DNR Fisheries Survey Summary

15 surveys on file from MN DNR Fisheries. Most recent: 2025-06-30 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
BNS56.00
Bluegill33.930.14 lb
Black Crappie13.030.17 lb
Yellow Perch12.680.1 lb
Black Bullhead8.250.34 lb
Largemouth Bass7.430.73 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

640 fish · 37 in · 2025-06-30
232116034567

Black Crappie

95 fish · 38 in · 2025-06-30
48240345678

Yellow Perch

97 fish · 58 in · 2025-06-30
552805678

Black Bullhead

5 fish · 68 in · 2025-06-30
320678

From the 2025-06-30 survey

Eagle Lake is a 291-acre lake with a maximum depth of 34 feet. It is located in north central Hennepin County, in the city of Maple Grove. There is a DNR-owned public access on the northeast corner of the lake. Eagle Lake is actively managed for Muskellunge and Walleye, which are stocked to maintain the populations.…

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 Eagle 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: 2024-10-14

Monitoring stations: 4