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LakeQuality
B

Wolf Lake

Beltrami County, MinnesotaMesotrophic

Wolf Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

A TSI near 46 places Wolf Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. At 57 ft of maximum depth, Wolf Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. Wolf Lake covers 1,076 acres alongside 8.0 miles of shoreline, large enough that conditions can vary meaningfully between bays. Wolf Lake sits at rank 54 of 86 in Beltrami County, in the lower half of the local distribution.

Wolf 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. Wolf Lake's fishery is anchored by muskellunge, with 18 documented species in total — a destination water for muskie anglers. Public access is available — the lake is on the Minnesota PCA public-access list. Ice-out has been recorded 9 times at Wolf Lake, with a median around Apr 25. 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 2021-09-19. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 9 ft. Phosphorus level: 19 µg/L. Trophic State Index: 46.

MetricValueGrade
Water Clarity (Secchi Depth)9 ftC
Phosphorus19 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)46Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth57 ft
Surface Area1.1K acres
Shoreline Length8 mi
Littoral Zone36%
Public AccessYes

Fish Species

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

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

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

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

Invasive Species

starry stonewortzebra mussel

Water Quality Trend: Improving

Based on 3 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.145 m/yr3
Phosphorus Improving-0.5 µg/L/yr2

Ice Season

Historical ice data from Minnesota DNR (13 observations).

Typical Ice-Out
Apr 25
Typical Ice-In
Dec 1

Estimated open water season: 220 days

EarliestLatest
Ice-Out2021-04-05 (2021)2022-05-07 (2022)
Ice-In2023-11-28 (2023)2021-12-07 (2021)

Most recent ice-out: 2025-04-25

Location

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County Ranking

Ranked #54 of 86 lakes in Beltrami County

Nearby Lakes in Beltrami County

DNR Fisheries Survey Summary

10 surveys on file from MN DNR Fisheries. Most recent: 2025-08-07 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Yellow Perch38.460.17 lb
Bluntnose Minnow30.99
BKF25.99
Tullibee (Cisco)7.111.08 lb
MMS6.79
Walleye6.331.41 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

589 fish · 410 in · 2019-07-08
222111045678910

Tullibee (Cisco)

19 fish · 1417 in · 2019-07-08
84014151617

Walleye

89 fish · 723 in · 2019-07-08
1470trophy 24810121416182022

From the 2025-08-07 survey

Temperature and dissolved oxygen measurements were collected from the deepest basin in Wolf Lake, which is located partially within the Leech Lake Reservation, on August 7th, 2025, to evaluate the quantity and quality of cold, oxygenated water (oxythermal habitat) available to coldwater fish species such as Cisco,…

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 Wolf Lake. 5 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: 2021-09-19

Monitoring stations: 2