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B

Unnamed Lake

Itasca County, MinnesotaLimited DataMesotrophic

Unnamed Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. The lake's 53 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. Unnamed Lake is small — 39 acres alongside 1.1 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 141 graded lakes in Itasca County, Unnamed Lake sits at rank 59, above the county median.

Unnamed Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. Bass fishing is part of the appeal: the species list runs to 9, anchored by largemouth and/or smallmouth bass. Public access is available — the lake is on the Minnesota PCA public-access list. Ice-out has been recorded 18 times at Unnamed Lake, with a median around Apr 18. 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 2024-07-28. 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 13 ft. Trophic State Index: 40.

MetricValueGrade
Water Clarity (Secchi Depth)13 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)40Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth53 ft
Average Depth23 ft
Surface Area38.97 acres
Shoreline Length1.1 mi
Littoral Zone33%
Public AccessYes

Fish Species

black crappie,bluegill,bowfin (dogfish),green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed,yellow bullhead

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

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

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

Unnamed 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.

Eurasian watermilfoil

Water Quality Trend: Improving

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.106 m/yr4
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (31 observations).

Typical Ice-Out
Apr 18
Typical Ice-In
Nov 24

Estimated open water season: 220 days

EarliestLatest
Ice-Out2000-03-30 (2000)1996-05-05 (1996)
Ice-In1995-11-12 (1995)1998-12-08 (1998)

Most recent ice-out: 2025-04-18

Location

Loading map…

County Ranking

Ranked #59 of 141 lakes in Itasca County

Cleaner Lakes Within 30 Miles

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

Nearby Lakes in Itasca County

DNR Fisheries Survey Summary

5 surveys on file from MN DNR Fisheries. Most recent: 2014-07-28 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill8.350.13 lb
Northern Pike3.271.63 lb
Black Crappie1.890.2 lb
Brown Bullhead1.880.93 lb
Black Bullhead1.750.44 lb
Yellow Bass1.430.66 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

72 fish · 27 in · 2014-07-28
24120234567

Northern Pike

23 fish · 1431 in · 2014-07-28
420141618202224262830

Black Crappie

20 fish · 510 in · 2014-07-28
630trophy 105678910

Brown Bullhead

3 fish · 1012 in · 1999-08-23
210101112

From the 2014-07-28 survey

Ice Lake is a small, mesotrophic lake located in Grand Rapids, Minnesota. Ice Lake has a surface area of 42 acres, a littoral area of 13 acres, and a maximum depth of 53 feet. The lake is clear and the Secchi depth was 10 feet during the 2014 assessment. Ice Lake has an inlet from McKinney Lake and outlets to Hale…

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 Unnamed Lake. 3 reports on file.

EPA Impairment Status

Unnamed Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN31-0533-00 · Official waterbody report · Matched by proximity (2.59 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2024-07-28

Monitoring stations: 1