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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.3 ft | C |
| Phosphorus | 25 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 24 ft |
| Average Depth | 11.9 ft |
| Surface Area | 524.59 acres |
| Shoreline Length | 4.3 mi |
| Littoral Zone | 47% |
| Public Access | Yes |
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).
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-17 (2024) | 2022-05-07 (2022) |
| Ice-In | 2023-11-28 (2023) | 2024-11-30 (2024) |
Most recent ice-out: 2025-04-22
Location
County Ranking
Ranked #121 of 133 lakes in Cass County
Nearby Lakes in Cass County
More Minnesota Lake Rankings
State Parks Near Little Wolf Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2024-08-05 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Yellow Perch | 56.63 | 0.13 lb |
| IOD | 55.14 | — |
| Largemouth Bass | 14.70 | 1.01 lb |
| Bluegill | 9.76 | 0.21 lb |
| Muskellunge | 8.27 | 8.93 lb |
| Bluntnose Minnow | 8.11 | — |
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
Largemouth Bass
Bluegill
Muskellunge
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…
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.
- —Fisheries Lake Survey — Little WolfFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — Little WolfFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — Little WolfPublic Water Access Sites · MN DNR LakeFinder
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