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B

Connors Lake

Itasca County, MinnesotaLimited DataMesotrophic

Connors Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. At 68 ft of maximum depth, Connors Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. At 142 acres, Connors Lake fits the Minnesota median for monitored lakes, with 2.8 miles of shoreline. Within Itasca County's 141 graded lakes, Connors Lake ranks 78 — below the local median, though not at the bottom.

Connors Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery includes walleye among the lake's 10 documented species — a notable draw for Minnesota anglers. No formal public access is documented at Connors Lake — most use is by shoreline residents and their guests. The lake has a partial ice record — 17 observed ice-outs, centered near Apr 24. 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, Minnesota DNR LakeFinder, last sampled 2024-08-13. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 10.5 ft. Trophic State Index: 43.

MetricValueGrade
Water Clarity (Secchi Depth)10.5 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)43Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth68 ft
Surface Area141.76 acres
Shoreline Length2.8 mi
Littoral Zone29%
Public AccessNo

Fish Species

black crappie,bluegill,brown bullhead,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,walleye,yellow bullhead,yellow perch

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

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

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

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

Water Quality Trend: Declining

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.072 m/yr5
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (26 observations).

Typical Ice-Out
Apr 24
Typical Ice-In
Nov 23

Estimated open water season: 213 days

EarliestLatest
Ice-Out2012-03-24 (2012)2013-05-11 (2013)
Ice-In2017-11-05 (2017)2024-12-08 (2024)

Most recent ice-out: 2024-04-06

Location

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County Ranking

Ranked #78 of 141 lakes in Itasca County

Cleaner Lakes Within 30 Miles

Connors Lake holds Grade B. 5 nearby lakes hold higher grades.

Nearby Lakes in Itasca County

State Parks Near Connors Lake

DNR Fisheries Survey Summary

3 surveys on file from MN DNR Fisheries. Most recent: 2007-09-04 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill13.130.15 lb
Yellow Perch9.630.13 lb
Yellow Bass6.440.78 lb
Black Crappie1.950.34 lb
Pumpkinseed1.750.23 lb
Northern Pike1.662.54 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

92 fish · 37 in · 2007-09-04
4824034567

Yellow Perch

1 fish · 77 in · 2007-09-04
107

Yellow Bass

128 fish · 813 in · 2007-09-04
492508910111213

Black Crappie

51 fish · 49 in · 2007-09-04
1260trophy 10456789

From the 2007-09-04 survey

Connors Lake is located 2 miles north of Bigfork, MN in the Big Fork River watershed. The lake has a surface area of 135 acres and a maximum depth of 68 feet. Connors Lake is in ecological lake class #20. Other area lakes in this class include Bustic, Brush Shanty and Noma Lakes. The northern pike gill-net catch rate…

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 Connors Lake. 2 reports on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2024-08-13

Monitoring stations: 1