Horseshoe Lake
Itasca County, MinnesotaLimited DataMesotrophic
Horseshoe Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.
Mesotrophic conditions dominate at Horseshoe Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake bottoms out at 25 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake's 260 acres and 3.2 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Horseshoe Lake ranks 58 of 141 in Itasca County — solidly in the upper half of the local distribution.
Horseshoe Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery includes walleye among the lake's 13 documented species — a notable draw for Minnesota anglers. The lake lacks a documented public access point, so visitor use is limited. 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 2024-10-10. Grade methodology: LakeGrade methodology.
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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 10.5 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 25 ft |
| Surface Area | 260.22 acres |
| Shoreline Length | 3.2 mi |
| Littoral Zone | 93% |
| Public Access | No |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Horseshoe Lake (14-day solunar calendar)
→ Is it safe to eat fish from Horseshoe Lake? (mercury & PFAS guide)
→ Horseshoe Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.152 m/yr | 5 |
Location
County Ranking
Ranked #58 of 141 lakes in Itasca County
Cleaner Lakes Within 30 Miles
Horseshoe Lake holds Grade B. 5 nearby lakes hold higher grades.
Nearby Lakes in Itasca County
More Minnesota Lake Rankings
State Parks Near Horseshoe Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
5 surveys on file from MN DNR Fisheries. Most recent: 2007-08-27 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Bullhead | 18.27 | 0.3 lb |
| Yellow Perch | 10.58 | 0.16 lb |
| Bluegill | 5.91 | 0.23 lb |
| Northern Pike | 5.13 | 1.76 lb |
| Pumpkinseed | 3.31 | 0.17 lb |
| White Sucker | 3.07 | 2.65 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.
Black Bullhead
Yellow Perch
Bluegill
Northern Pike
From the 2007-08-27 survey
Horseshoe Lake is a 270-acre lake in Itasca County near Marcell. Horseshoe Lake is a relatively small, shallow, hardwater lake that has occasionally experienced winterkill. The lake has historically been managed for walleye and centrachids. A population assessment was conducted on Horseshoe Lake in 2007 to determine…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Horseshoe Lake. 2 reports on file.
- —Fisheries Lake Survey — HorseshoeFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Horseshoe (0817)Aquatic Plant Report · MN DNR LakeFinder
EPA Impairment Status
Horseshoe Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN31-0726-00 · Official waterbody report · Matched by proximity (2.32 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
Most recent sample: 2024-10-10
Monitoring stations: 1