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F

Stay Lake

Lincoln County, MinnesotaHypereutrophic

Stay Lake earns an F: 172 µg/L of phosphorus and clarity at 1.0 ft signal heavy nutrient loading from the surrounding watershed. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

The hypereutrophic status — TSI 78 — reflects sustained heavy nutrient loading from the surrounding watershed and frequent algal pressure. At only 6 ft deep, Stay Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. Stay Lake covers 221 acres alongside 3.0 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 5 graded lakes of Lincoln County, Stay Lake sits at rank 5, near the bottom of the county list.

No invasive species are currently listed at Stay Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye among the lake's 12 documented species — a notable draw for Minnesota anglers. A documented public access point at Stay Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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 2021-09-15. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1 ft of visibility. Phosphorus level: 171.5 µg/L. Trophic State Index: 78.

MetricValueGrade
Water Clarity (Secchi Depth)1 ftF
Phosphorus171.5 µg/LF
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)78Hypereutrophic

Very high nutrients, dense algae, poor clarity

Lake Details

CharacteristicValue
Maximum Depth6 ft
Surface Area221.2 acres
Shoreline Length3 mi
Littoral Zone100%
Public AccessYes

Fish Species

bigmouth buffalo,black bullhead,black crappie,common carp,freshwater drum,green sunfish,largemouth bass,northern pike,orangespotted sunfish,walleye,white sucker,yellow perch

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

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

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

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

Location

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County Ranking

Ranked #5 of 5 lakes in Lincoln County

Cleaner Lakes Within 30 Miles

Stay Lake holds Grade F. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Lincoln County

State Parks Near Stay Lake

Hypereutrophic Lakes in Minnesota

DNR Fisheries Survey Summary

11 surveys on file from MN DNR Fisheries. Most recent: 2025-08-25 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Black Bullhead69.530.16 lb
Yellow Perch52.650.23 lb
Common Carp19.682.02 lb
Black Crappie19.150.35 lb
Walleye11.162.49 lb
Bigmouth Buffalo4.112.28 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.

Black Bullhead

105 fish · 410 in · 2025-08-25
3719045678910

Yellow Perch

36 fish · 511 in · 2025-08-25
1890trophy 12567891011

Common Carp

93 fish · 1331 in · 2025-08-25
42210141618202224262830

Black Crappie

1 fish · 1111 in · 2025-08-25
1011

From the 2025-08-25 survey

East Stay Lake is a shallow (max depth of 6 ft.) 224-acre, class 42 lake, located in Lincoln County. Despite aeration, partial winterkills occasionally occur. East Stay Lake has one of the few remaining natural spawning runs for Northern Pike in Windom fisheries management area, as it is connected to several shallow…

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 Stay Lake. 3 reports on file.

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

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

Source: EPA ATTAINS assessment unit MN41-0034-00 · 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

Most recent sample: 2021-09-15

Monitoring stations: 1