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Eagles Nest Lake

St. Louis County, MinnesotaOligotrophic

Eagles Nest Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in St. Louis County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI value of 35 puts Eagles Nest Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake bottoms out at 49 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 1,028 acres, Eagles Nest Lake is one of the larger lakes in St. Louis County, with 16.3 miles of shoreline supporting multiple distinct use patterns. Among the 215 graded lakes in St. Louis County, Eagles Nest Lake ranks 3 — in the top quartile locally.

No invasive species are currently listed at Eagles Nest Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Eagles Nest Lake, one of 9 fish species on record for the lake. A documented public access point at Eagles Nest Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 18 observed ice-outs, centered near Apr 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 2025-09-28. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 15.5 ft down. Phosphorus level: 7 µg/L. Trophic State Index: 35.

MetricValueGrade
Water Clarity (Secchi Depth)15.5 ftA
Phosphorus7 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)35Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth49 ft
Surface Area1,028 acres
Shoreline Length16.3 mi
Littoral Zone54%
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

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

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

Eagles Nest Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Stable

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable-0.021 m/yr6
See year-by-year chart →

Recreation & Access

2
Boat Landings
Yes
Public Access

Ice Season

Historical ice data from Minnesota DNR (32 observations).

Typical Ice-Out
Apr 29
Typical Ice-In
Nov 21

Estimated open water season: 206 days

EarliestLatest
Ice-Out2017-04-11 (2017)2013-05-13 (2013)
Ice-In2019-11-07 (2019)2016-12-10 (2016)

Most recent ice-out: 2025-05-04

Location & Depth Map

Loading map…

Free interactive depth-contour map of Eagles Nest Lake, reaching a maximum surveyed depth of 40 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Minnesota DNR.

County Ranking

Ranked #3 of 215 lakes in St. Louis County

Nearby Lakes in St. Louis County

DNR Fisheries Survey Summary

7 surveys on file from MN DNR Fisheries. Most recent: 2025-08-18 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
BNS15.56
Yellow Perch13.180.09 lb
Bluntnose Minnow7.17
BUB6.472.23 lb
Walleye5.931.19 lb
Bluegill5.590.19 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.

Yellow Perch

197 fish · 27 in · 2025-08-18
105530234567

BUB

1 fish · 2020 in · 2025-08-18
1020

Walleye

202 fish · 325 in · 2025-08-18
46230trophy 244681012141618202224

Bluegill

18 fish · 38 in · 2025-08-18
740345678

From the 2025-08-18 survey

Eagles Nest 3 (69-0285-03) is a 1,028-acre lake located 8 miles east of Tower. It is accessed by a concrete ramp off the Eagles Nest 3 access road which is off the Bear Head Lake State Park Road. A state park vehicle permit is required to launch and park at this access. The lake has a maximum depth of 49 feet and had…

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 Eagles Nest Lake. 3 reports on file.

EPA Impairment Status

Eagles Nest Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

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

Source: EPA ATTAINS assessment unit MN69-0285-03 · Official waterbody report · Matched by proximity (0.52 km)

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

Public boat-access points from the USGS National Boat Ramps inventory

Ice data from Minnesota DNR Climate

Most recent sample: 2025-09-28

Monitoring stations: 10

Where to stay near Eagles Nest Lake

Compare lakeside cabins, hotels, and vacation rentals near Eagles Nest Lake in St. Louis County, Minnesota — live availability and prices for your trip.

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