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B

Moose Lake

Itasca County, MinnesotaLimited DataMesotrophic

Moose 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. Moose Lake is unusually deep for Minnesota at 61 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. At 1,273 acres, Moose Lake is one of the larger lakes in Itasca County, with 7.3 miles of shoreline supporting multiple distinct use patterns. Moose Lake ranks 63 of 141 in Itasca County — solidly in the upper half of the local distribution.

Moose Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Muskie are on the species list at Moose Lake, among the lake's 17 documented fish. Public access is available — the lake is on the Minnesota PCA public-access list. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-21. 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 11.5 ft. Trophic State Index: 42.

MetricValueGrade
Water Clarity (Secchi Depth)11.5 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)42Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth61 ft
Surface Area1.3K acres
Shoreline Length7.3 mi
Littoral Zone27%
Public AccessYes

Fish Species

black crappie,bluegill,bowfin (dogfish),burbot,hybrid sunfish,largemouth bass,muskellunge,northern pike,northern sunfish,pumpkinseed,rock bass,smallmouth bass,tiger muskellunge,tullibee (cisco),walleye,white sucker,yellow perch

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

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

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

Moose 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.

zebra mussel

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.175 m/yr5
See year-by-year chart →

Location

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County Ranking

Ranked #63 of 141 lakes in Itasca County

Cleaner Lakes Within 30 Miles

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

Nearby Lakes in Itasca County

DNR Fisheries Survey Summary

27 surveys on file from MN DNR Fisheries. Most recent: 2025-08-06 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Yellow Perch32.180.18 lb
Bluntnose Minnow17.43
OTM15.25
CNM11.98
MMS10.20
Tullibee (Cisco)9.720.78 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.

Yellow Perch

475 fish · 59 in · 2023-08-21
347174056789

Tullibee (Cisco)

111 fish · 612 in · 2023-08-21
522606789101112

From the 2025-08-06 survey

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Moose Lake on August 6th, 2025, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, the most sensitive coldwater species present in this lake.…

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 Moose Lake. 4 reports on file.

EPA Impairment Status

Moose 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 MN31-0722-00 · Official waterbody report

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

Most recent sample: 2024-10-21

Monitoring stations: 2