Skip to main content
LakeQuality
B

Little Wolf Lake

Cass County, MinnesotaMesotrophic

On the LakeGrade scale Little Wolf Lake grades a B, with clarity at 9.3 ft and 25 µg/L of phosphorus placing it above the Minnesota median. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Little Wolf Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake bottoms out at 24 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Little Wolf Lake covers 525 acres alongside 4.3 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Little Wolf Lake ranks 121 of 133 in Cass County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Little Wolf Lake — the lake remains off the Minnesota infested-waters roster. Little Wolf Lake's fishery is anchored by muskellunge, with 13 documented species in total — a destination water for muskie anglers. 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 2024-09-17. 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 9.3 ft. Phosphorus level: 25 µg/L. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)9.3 ftC
Phosphorus25 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth24 ft
Average Depth11.9 ft
Surface Area524.59 acres
Shoreline Length4.3 mi
Littoral Zone47%
Public AccessYes

Fish Species

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

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

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

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

Ice Season

Historical ice data from Minnesota DNR (6 observations).

Typical Ice-Out
Apr 11
EarliestLatest
Ice-Out2024-03-17 (2024)2022-05-07 (2022)
Ice-In2023-11-28 (2023)2024-11-30 (2024)

Most recent ice-out: 2025-04-22

Location

Loading map…

County Ranking

Ranked #121 of 133 lakes in Cass County

Nearby Lakes in Cass County

DNR Fisheries Survey Summary

12 surveys on file from MN DNR Fisheries. Most recent: 2024-08-05 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Yellow Perch56.630.13 lb
IOD55.14
Largemouth Bass14.701.01 lb
Bluegill9.760.21 lb
Muskellunge8.278.93 lb
Bluntnose Minnow8.11

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

337 fish · 49 in · 2024-08-05
196980456789

Largemouth Bass

8 fish · 616 in · 2024-08-05
320678910111213141516

Bluegill

206 fish · 37 in · 2024-08-05
6734034567

Muskellunge

6 fish · 2039 in · 2024-08-05
21020222426283032343638

From the 2024-08-05 survey

Little Wolf Lake is a 528-acre lake with a maximum depth of 24 feet located near the town of Cass Lake on the Hubbard/Cass county line. The public access is township-owned and located on the northwest side of the lake. The unimproved ramp results in limited access for larger boats due to landing design, water depths…

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 Little Wolf Lake. 3 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: 2024-09-17

Monitoring stations: 1