Skip to main content
LakeQuality
A

Bear Paw Lake

Oconto County, WisconsinOligotrophic

Bear Paw Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Oconto County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 47 acres, Bear Paw Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Bear Paw Lake sits at rank 36 of 66 in Oconto County, in the lower half of the local distribution.

Eurasian watermilfoil is established at Bear Paw Lake, which can dampen recreational access and pressure the native plant community. The fishery is bass-led, with 3 documented species across the lake's records. Public access is available — the lake is on the Wisconsin DNR public-access list. 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 2025-09-03. 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 52.5 ft down. Phosphorus level: 11.1 µg/L. Trophic State Index: 29.

MetricValueGrade
Water Clarity (Secchi Depth)52.5 ftA
Phosphorus11.1 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)29Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Surface Area47 acres
Public AccessYes

Fish Species

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

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

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

Bear Paw Lake fishing regulations (limits, seasons, special rules)

Invasive Species

Banded Mystery SnailEurasian Water-Milfoil

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.393 m/yr7
Phosphorus Improving-0.59 µg/L/yr5
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

Loading map…

County Ranking

Ranked #36 of 66 lakes in Oconto County

Nearby Lakes in Oconto County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2025).

DNR Assessment
Excellent · Deep Seepage lake
Trophic State Index 34 (oligotrophic) · 5-year average

Fish Species (DNR-rated)

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

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: 2025-09-03

Monitoring stations: 2