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.
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | F |
| Phosphorus | 51.5 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 10 ft |
| Surface Area | 996.28 acres |
| Shoreline Length | 8.7 mi |
| Littoral Zone | 100% |
| Public Access | Yes |
Fish Species
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).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.126 m/yr | 5 |
| Phosphorus | ↓ Declining | +11.5 µg/L/yr | 3 |
Ice Season
Historical ice data from Minnesota DNR (50 observations).
Estimated open water season: 239 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-03 (2024) | 2018-04-30 (2018) |
| Ice-In | 2019-11-07 (2019) | 2023-12-27 (2023) |
Most recent ice-out: 2026-03-13
Location
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
More Minnesota Lake Rankings
State Parks Near Shaokotan Lake
Other Grade D Lakes in Minnesota
Eutrophic Lakes in Minnesota
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
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Fathead Minnow | 258.45 | — |
| Black Bullhead | 111.90 | 0.49 lb |
| Walleye | 46.87 | 2.01 lb |
| Yellow Perch | 41.02 | 0.29 lb |
| JND | 13.01 | — |
| Bluegill | 7.03 | 0.32 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
Walleye
Yellow Perch
Bluegill
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…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Shaokotan Lake. 3 reports on file.
- —Fisheries Lake Survey — ShaokotanFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — ShaokotanFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — ShaokotanPublic Water Access Sites · MN DNR LakeFinder
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
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