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D

Little Shoepack Lake

St. Louis County, MinnesotaLimited DataEutrophic

Little Shoepack Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average.

At a TSI of 51, Little Shoepack Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Little Shoepack Lake reaches 25 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 51 acres, Little Shoepack Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Little Shoepack Lake ranks 144 of 187 in St. Louis County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Little Shoepack Lake — the lake remains off the Minnesota infested-waters roster. Little Shoepack Lake's fishery is anchored by muskellunge, with 3 documented species in total — a destination water for muskie anglers. No formal public access is documented at Little Shoepack Lake — most use is by shoreline residents and their guests. 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 2023-08-01. 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 6.2 ft. Trophic State Index: 51.

MetricValueGrade
Water Clarity (Secchi Depth)6.2 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)51Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth25 ft
Surface Area51.39 acres
Shoreline Length2.1 mi
Littoral Zone99%
Public AccessNo

Fish Species

muskellunge,white sucker,yellow perch

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

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

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

Little Shoepack Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Stable

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

MetricTrendChange/YearYears
Water Clarity Improving+0.06 m/yr5
Phosphorus Declining+3.55 µg/L/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #144 of 187 lakes in St. Louis County

Cleaner Lakes Within 30 Miles

Little Shoepack Lake holds Grade D. 2 nearby lakes hold higher grades.

Nearby Lakes in St. Louis County

Eutrophic Lakes in Minnesota

DNR Fisheries Survey Summary

2 surveys on file from MN DNR Fisheries. Most recent: 2025-07-21 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Yellow Perch37.120.04 lb
CNM20.20
IOD6.34
GOS4.590.01 lb
BNS3.58
Muskellunge2.751.76 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

213 fish · 35 in · 2025-07-21
129650345

GOS

44 fish · 34 in · 2025-07-21
4121034

Muskellunge

1 fish · 1414 in · 2025-07-21
1014

From the 2025-07-21 survey

A targeted survey of nearshore fish species in Little Shoepack Lake, which is located within Voyageurs National Park, was conducted on July 21- July 22, 2025, by Lake Biological Monitoring and Assessment (LBMA) Program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack…

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 Little Shoepack Lake. 1 report on file.

EPA Impairment Status

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

Causes of impairment

Mercury

Source: EPA ATTAINS assessment unit MN69-0868-00 · Official waterbody report · Matched by proximity (0.29 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

Most recent sample: 2023-08-01

Monitoring stations: 1