Lottie Lake
Douglas County, Minnesota46 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Lottie Lake. Here is what has been measured.
- Oligotrophic
- zebra mussel
- 31 ft max depth
- Public access
Lottie Lake in Douglas County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 16.1 ft visibility. Phosphorus: 15.5 µg/L. Chlorophyll-a (algae): 2.2 µg/L. Maximum depth: 31 ft. Surface area: 46.37 acres.
Minnesota DNR's Standard Survey on August 6, 2018 caught 1.00 walleye per gill net at Lottie Lake. DNR survey details →
Lottie Lake is a 46-acre cold, clear oligotrophic lake in Douglas County, Minnesota with a maximum depth of 31 feet (6-foot average). Overall water quality is declining over recent sampling years. The lake supports 14 documented fish species including black bullhead, black crappie, and bluegill. Public access is available. Compared to the 36 other monitored lakes in Douglas County, Lottie Lake ranks #17 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-17. Methodology: how these readings are compared.
What Lottie Lake is good for
From access and monitoring records, not editorial picks.
- Clear water16.1 ft of visibility
- Fishing14 species recorded
- Deep water31 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lottie 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 Lottie Lake
These are the measurements Minnesota PCA publishes for Lottie 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 16.1 ft down. Phosphorus 15.5 µg/L. Chlorophyll-a 2.2 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 16.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 15.5µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 2.2µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lottie Lake
Answers come straight from the public measurements and survey records on this page.
Minnesota DNR's Standard Survey on August 6, 2018 caught 1.00 walleye per gill net at Lottie Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lottie Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
6 surveys on file from MN DNR Fisheries. Most recent: 2018-08-06 (Standard Survey).
6 surveys on file · most recent 2018-08-06 (Standard Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Bluegill | 22.74 | 3–8 in 2018-08-06 | 0.18 lb |
| Black Bullhead | 8.74 | 9–13 in 2018-08-06 | 0.97 lb |
| Yellow Bullhead | 5.63 | 9–12 in 2018-08-06 | 0.71 lb |
| Tullibee (Cisco) | 4.50 | 7–17 in 1997-07-28 | 1.32 lb |
| Northern Pike | 4.14 | 12–28 in 2018-08-06 | 1.64 lb |
| Pumpkinseed | 3.93 | 4–7 in 2018-08-06 | 0.19 lb |
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
Black Bullhead
Yellow Bullhead
Tullibee (Cisco)
From the 2018-08-06 survey
North Union, Stony, and Lottie (Taylor) lakes form a chain of lakes between Brophy and Cowdry Lakes in Douglas County. Lottie Lake is the lower lake in the chain and discharges to Lake Cowdry. None of these three small basins have public landings, but anglers can utilize access sites on Cowdry and Brophy Lakes and…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Lottie Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — LottieFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
31 ft
Average depth
6 ft
Surface area
46 acres
Shoreline
2.2 mi
Littoral zone
88%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
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Stays near Lottie Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Lottie 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 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Worsening+0.89 µg/L/yr6 years
Chlorophyll-a
Stable+0.01 µg/L/yr6 years
Nearby Lakes in Douglas County
Frequently asked questions about Lottie Lake
Where is Lottie Lake?
- Lottie Lake is a lake in Douglas County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Lottie Lake?
- Lottie Lake in Douglas County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 16.1 ft visibility. Phosphorus: 15.5 µg/L. Chlorophyll-a (algae): 2.2 µg/L. Maximum depth: 31 ft. Surface area: 46.37 acres.
Is Lottie Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lottie Lake?
- Lottie Lake has a maximum depth of 31 feet and an average depth of 6 feet. The lake covers 46.37 acres.
What fish are in Lottie Lake?
- Fish species found in Lottie Lake include black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, common carp, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, walleye, yellow bullhead, yellow perch. Lottie Lake is located in Douglas County, Minnesota.
What did the DNR fisheries survey find at Lottie Lake?
- Minnesota DNR's Standard Survey on August 6, 2018 caught 1.00 walleye per gill net at Lottie Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lottie Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Lottie Lake?
- Public access to Lottie 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
29 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA29 samples · 2020–2023
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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 details from Minnesota DNR LakeFinder