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D

Cedar Lake

Hennepin County, MinnesotaEutrophic

Cedar Lake earns a D — measurements through 2023 show persistent nutrient pressure that limits clarity through the summer. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

At a TSI of 61, Cedar Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. At 51 ft of maximum depth, Cedar Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. The lake's 164 acres and 3.0 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Cedar Lake ranks 38 of 95 in Hennepin County — solidly in the upper half of the local distribution.

Eurasian watermilfoil has been documented at Cedar Lake, requiring shoreline management to keep dense mats from crowding native vegetation. Walleye are documented at Cedar Lake, one of 15 fish species on record for the lake. No formal public access is documented at Cedar Lake — most use is by shoreline residents and their guests. Ice-out has been recorded 12 times at Cedar Lake, with a median around Apr 9. 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 2023-10-23. 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

Murky, only visible to about 4.7 ft. Phosphorus level: 84.5 µg/L. Trophic State Index: 61.

MetricValueGrade
Water Clarity (Secchi Depth)4.7 ftD
Phosphorus84.5 µg/LD
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)61Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth51 ft
Surface Area163.79 acres
Shoreline Length3 mi
Littoral Zone38%
Public AccessNo

Fish Species

black bullhead,black crappie,bluegill,bowfin (dogfish),brown bullhead,common carp,green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,walleye,white sucker,yellow bullhead,yellow perch

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

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

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

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

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Eurasian watermilfoil

Water Quality Trend: Improving

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.393 m/yr4
Phosphorus Improving-1.25 µg/L/yr4
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (15 observations).

Typical Ice-Out
Apr 9
EarliestLatest
Ice-Out2024-03-06 (2024)2013-04-28 (2013)
Ice-In2022-12-05 (2022)2024-01-16 (2024)

Most recent ice-out: 2024-03-06

Location

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County Ranking

Ranked #38 of 95 lakes in Hennepin County

Cleaner Lakes Within 30 Miles

Cedar Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Hennepin County

DNR Fisheries Survey Summary

10 surveys on file from MN DNR Fisheries. Most recent: 2024-07-08 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill51.410.1 lb
Black Crappie6.610.14 lb
Black Bullhead3.410.34 lb
Northern Pike2.813.53 lb
Yellow Perch2.110.13 lb
Pumpkinseed2.050.1 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.

Bluegill

611 fish · 27 in · 2024-07-08
2641320234567

Black Crappie

52 fish · 49 in · 2024-07-08
20100trophy 10456789

Black Bullhead

4 fish · 611 in · 2024-07-08
21067891011

Northern Pike

39 fish · 1329 in · 2024-07-08
8401416182022242628

From the 2024-07-08 survey

Cedar is a 164-acre lake located in Minneapolis. It is the most upstream of the Minneapolis Chain of Lakes; downstream and connected are Lake of the Isles and Bde Maka Ska. A city park, maintained by the Minneapolis Parks and Recreation Board, surrounds the majority of the lake. This public land provides ample…

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 Cedar Lake. 2 reports on file.

EPA Impairment Status

Cedar 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

Source: EPA ATTAINS assessment unit MN27-0039-00 · 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

Ice data from Minnesota DNR Climate

Most recent sample: 2023-10-23

Monitoring stations: 1