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LakeQuality
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Red Cedar Lake

Barron County, WisconsinOligotrophic

Red Cedar Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Barron County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Trophically, Red Cedar Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. Red Cedar Lake is unusually deep for Wisconsin at 53 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 1,897 acres, Red Cedar Lake is one of the larger lakes in Barron County, with partial shoreline records supporting multiple distinct use patterns. Within Barron County's 38 graded waters, Red Cedar Lake sits at rank 7, near the top of the local distribution.

An invasive species record — Chinese Mystery Snail — has been logged at Red Cedar Lake; Wisconsin DNR maintains the official infested-waters list. Walleye are documented at Red Cedar Lake, one of 5 fish species on record for the lake. A documented public access point at Red Cedar Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-22. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 32.8 ft down. Phosphorus level: 17.4 µg/L. Trophic State Index: 36.

MetricValueGrade
Water Clarity (Secchi Depth)32.8 ftA
Phosphorus17.4 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)36Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth53 ft
Surface Area1.9K acres
Public AccessYes

Fish Species

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

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

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

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

Invasive Species

Chinese Mystery SnailCurly-Leaf PondweedPurple LoosestrifeRusty Crayfish

Water Quality Trend: Improving

Based on 3 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+1.5 m/yr2
Phosphorus Improving-1.48 µg/L/yr2

Recreation & Access

2
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #7 of 38 lakes in Barron County

Nearby Lakes in Barron County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 12 stations on file (most recent sample 2025).

DNR Assessment
Reported
Trophic State Index 51 (eutrophic) · 5-year average

Fish Species (DNR-rated)

Largemouth Bass(Common)Smallmouth Bass(Common)Northern Pike(Common)Walleye(Common)Panfish(Present)

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Red Cedar Lake covering fish populations, stocking, water quality, and management. 1 report on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2025-09-22

Monitoring stations: 4