Unnamed Lake
Otter Tail County, Minnesota1,357 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Unnamed Lake. Here is what has been measured.
- flowering rush
- 95 ft max depth
- Public access
- Limited data
Unnamed Lake in Otter Tail County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 15.1 ft visibility. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 2.6 µg/L. Maximum depth: 95 ft. Surface area: 1356.82 acres.
Minnesota DNR's Targeted Survey on August 8, 2022 caught 3.78 walleye per gill net at Unnamed Lake. DNR survey details →
Unnamed Lake is a 1,357-acre lake in Otter Tail County, Minnesota with a maximum depth of 95 feet. Overall water quality is declining over recent sampling years. The lake supports 17 documented fish species including black bullhead, black crappie, and bluegill. Public access is available.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-08-02. Methodology: how these readings are compared.
What Unnamed Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15.1 ft of visibility
- Fishing17 species recorded
- Ice seasonIce-out around Apr 25
- Deep water95 ft surveyed max depth
- Big water1,357 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Unnamed Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Unnamed Lake
These are the measurements Minnesota PCA publishes for Unnamed Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 15.1 ft down. Phosphorus 9 µg/L. Chlorophyll-a 2.6 µg/L. TSI 38.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 9µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.6µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 38 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Unnamed Lake
Answers come straight from the public measurements and survey records on this page.
Minnesota DNR's Targeted Survey on August 8, 2022 caught 3.78 walleye per gill net at Unnamed Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Unnamed Lake’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
11 surveys on file from MN DNR Fisheries. Most recent: 2022-08-08 (Targeted Survey).
11 surveys on file · most recent 2022-08-08 (Targeted Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Bluegill | 21.77 | 3–6 in 2022-08-08 | 0.12 lb |
| Largemouth Bass | 18.06 | 12–18 in 2022-08-08 | 1.52 lb |
| Yellow Perch | 12.09 | 5–8 in 2022-08-08 | 0.14 lb |
| Bluntnose Minnow | 6.71 |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
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.
Bluegill
Largemouth Bass
Yellow Perch
From the 2022-08-08 survey
Stalker Lake is a 1,280-acre mesotrophic (moderately fertile) lake located in southwestern Otter Tail County, approximately seven miles southeast of Underwood, MN. Stalker Lake is part of the Pomme de Terre River Watershed. The Pomme de Terre River outlet is located along the southwest shoreline of the lake. The…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Unnamed Lake. 4 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — StalkerFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Stalker (1169)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — StalkerFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — StalkerPublic Water Access Sites · MN DNR LakeFinder
Lake Details
Max depth
95 ft
Surface area
1,357 acres
Shoreline
8.1 mi
Littoral zone
42%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
10 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,273 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
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Stays near Unnamed Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Unnamed Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Stable5 years
Phosphorus
Stable+0.1 µg/L/yr5 years
Chlorophyll-a
Worsening+1.47 µg/L/yr5 years
Ice season
Typical ice-out
Apr 25
Earliest Apr 19, 2007 · Latest Apr 30, 2008
Typical ice-in
Nov 29
Earliest Nov 27, 2007 · Latest Dec 1, 2024
Most recent ice-out
Apr 30
2023
8 observations · Minnesota PCA ice records
Nearby Lakes in Otter Tail County
Frequently asked questions about Unnamed Lake
Where is Unnamed Lake?
- Unnamed Lake is a lake in Otter Tail County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Unnamed Lake?
- Unnamed Lake in Otter Tail County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 15.1 ft visibility. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 2.6 µg/L. Maximum depth: 95 ft. Surface area: 1356.82 acres.
Is Unnamed Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Unnamed Lake?
- Unnamed Lake has a maximum depth of 95 feet. The lake covers 1356.82 acres.
What fish are in Unnamed Lake?
- Fish species found in Unnamed Lake include black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, green sunfish, hybrid sunfish, largemouth bass, longnose gar, northern pike, pumpkinseed, rock bass, tullibee (cisco), walleye, white sucker, yellow bullhead, yellow perch. Unnamed Lake is located in Otter Tail County, Minnesota.
What did the DNR fisheries survey find at Unnamed Lake?
- Minnesota DNR's Targeted Survey on August 8, 2022 caught 3.78 walleye per gill net at Unnamed Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Unnamed Lake’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
When does Unnamed Lake thaw?
- Unnamed Lake typically has ice-out around Apr 25. Ice typically forms around Nov 29. The open water season is approximately 218 days.
Can I fish at Unnamed Lake?
- Public access to Unnamed Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
4 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA4 samples · 2023
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 2120 B ~ Color in Water by Visual Comparison
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate