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B

Pickerel Lake

Oconto County, WisconsinMesotrophic

On the LakeGrade scale Pickerel Lake grades a B, with clarity at 8.0 ft and 15 µg/L of phosphorus placing it above the Wisconsin median. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. At only 10 ft deep, Pickerel Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. At 176 acres, Pickerel Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Pickerel Lake sits at rank 34 of 62 in Oconto County, in the lower half of the local distribution.

An invasive species record — Banded Mystery Snail — has been logged at Pickerel Lake; Wisconsin DNR maintains the official infested-waters list. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. A documented public access point at Pickerel 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 2026-06-19. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 8 ft. Phosphorus level: 15.2 µg/L. Trophic State Index: 45.

MetricValueGrade
Water Clarity (Secchi Depth)8 ftC
Phosphorus15.2 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)45Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth10 ft
Surface Area176 acres
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

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

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

Pickerel 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.

Banded Mystery SnailChinese Mystery SnailPurple LoosestrifeRusty Crayfish

Water Quality Trend: Improving

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.125 m/yr7
Phosphorus Improving-0.79 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #34 of 62 lakes in Oconto County

Cleaner Lakes Within 30 Miles

Pickerel Lake holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Oconto County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2015. 5 stations on file (most recent sample 2025).

DNR Assessment
Excellent · Shallow Headwater lake
Trophic State Index 45 (mesotrophic) · 5-year average

Fish Species (DNR-rated)

Panfish(Present)Largemouth Bass(Present)Northern Pike(Present)

DNR Reports & Resources

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

Reservoir Info (USACE NID)

Pickerel Lake is a man-made reservoir impounded by the Pickerel Lake (completed 1960), built primarily for recreation on the Pickerel Creek; earth-type dam, 10 ft tall and 300 ft long.

Surface area
220 ac
Normal storage
517 ac-ft
Max storage
1,750 ac-ft
Drainage area
1.9 sq mi
Hazard class
Low
Owner
TOWN OF TOWNSEND

Source: USACE National Inventory of Dams, NID ID WI00712 · Operator website

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

Public boat-access points from the USGS National Boat Ramps inventory

Most recent sample: 2026-06-19

Monitoring stations: 2

Where to stay near Pickerel Lake

Compare lakeside cabins, hotels, and vacation rentals near Pickerel Lake in Oconto County, Wisconsin — live availability and prices for your trip.

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