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.
Watch Pickerel Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | C |
| Phosphorus | 15.2 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 10 ft |
| Surface Area | 176 acres |
| Public Access | Yes |
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.
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.125 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.79 µg/L/yr | 6 |
Recreation & Access
Location
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.
- ALittle Pickerel LakeOconto County · mi · Higher grade (B → A)
- ALittle Horn LakeOconto County · mi · Higher grade (B → A)
Nearby Lakes in Oconto County
More Wisconsin Lake Rankings
State Parks Near Pickerel Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2015. 5 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
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.
- 2020Pickerel Chain summary report, 2020Fisheries Survey · WI DNR · 2020 (PDF)
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.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.