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D

Shaokotan Lake

Lincoln County, MinnesotaEutrophic

Shaokotan Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

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. Shaokotan Lake is a shallow lake at 10 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. Shaokotan Lake covers 996 acres alongside 8.7 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Shaokotan Lake sits at rank 3 of 5 in Lincoln County, in the lower half of the local distribution.

Shaokotan Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery includes walleye among the lake's 8 documented species — a notable draw for Minnesota anglers. Public access is available — the lake is on the Minnesota PCA public-access list. Ice-out has been logged at Shaokotan Lake more than two dozen times, putting the median around Mar 31 — 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 2024-09-29. 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

Very murky, less than 3 ft of visibility. Phosphorus level: 51.5 µg/L. Trophic State Index: 61.

MetricValueGrade
Water Clarity (Secchi Depth)3 ftF
Phosphorus51.5 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)61Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth10 ft
Surface Area996.28 acres
Shoreline Length8.7 mi
Littoral Zone100%
Public AccessYes

Fish Species

black bullhead,bluegill,green sunfish,largemouth bass,northern pike,walleye,white sucker,yellow perch

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

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

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

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

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.126 m/yr5
Phosphorus Declining+11.5 µg/L/yr3
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (50 observations).

Typical Ice-Out
Mar 31
Typical Ice-In
Nov 25

Estimated open water season: 239 days

EarliestLatest
Ice-Out2024-03-03 (2024)2018-04-30 (2018)
Ice-In2019-11-07 (2019)2023-12-27 (2023)

Most recent ice-out: 2026-03-13

Location

Loading map…

County Ranking

Ranked #3 of 5 lakes in Lincoln County

Cleaner Lakes Within 30 Miles

Shaokotan Lake holds Grade D. One nearby lake has a higher grade.

See full comparison →

Nearby Lakes in Lincoln County

State Parks Near Shaokotan Lake

Compare Shaokotan Lake With Nearby Lakes

DNR Fisheries Survey Summary

21 surveys on file from MN DNR Fisheries. Most recent: 2025-10-23 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Fathead Minnow258.45
Black Bullhead111.900.49 lb
Walleye46.872.01 lb
Yellow Perch41.020.29 lb
JND13.01
Bluegill7.030.32 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

527 fish · 313 in · 2024-08-05
166830345678910111213

Walleye

52 fish · 59 in · 2025-10-23
2915056789

Yellow Perch

422 fish · 59 in · 2024-08-05
209105056789

Bluegill

14 fish · 38 in · 2024-08-05
840345678

From the 2025-10-23 survey

Lake Shaokotan is a 995-acre, class 41 lake located near the city of Ivanhoe in Lincoln County. Lake Shaokotan is managed primarily for Walleye and secondarily for Northern Pike, Yellow Perch and Bluegill. Lake Shaokotan has had sporadic natural reproduction by Walleye, but it is believed that the population is…

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 Shaokotan Lake. 3 reports on file.

Reservoir Info (USACE NID)

Shaokotan Lake is a man-made reservoir impounded by the Lake Shaokatan (completed 1917), built primarily for other on the Yellow Medicine River; gravity-type dam, 8 ft tall and 98 ft long.

Surface area
994 ac
Normal storage
155 ac-ft
Max storage
408 ac-ft
Drainage area
13.8 sq mi
Hazard class
Low
Owner
County of Lincoln

Source: USACE National Inventory of Dams, NID ID MN00122 · Operator website · Matched by proximity (0.86 km)

EPA Impairment Status

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

Causes of impairment

Impaired biota (cause unknown)Mercury

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

Source: EPA ATTAINS assessment unit MN41-0089-00 · 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

Ice data from Minnesota DNR Climate

Most recent sample: 2024-09-29

Monitoring stations: 3