Horseshoe Lake
Langlade County, WisconsinMesotrophic
On the LakeGrade scale Horseshoe Lake grades a B, with clarity at 8.0 ft and 18 µg/L of phosphorus placing it above the Wisconsin median. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Wisconsin norms.
Mesotrophic conditions dominate at Horseshoe Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. Horseshoe Lake reaches 29 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 11 acres, Horseshoe Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Among the 32 graded lakes in Langlade County, Horseshoe Lake sits at rank 9, above the county median.
Horseshoe Lake has no invasive species recorded in Wisconsin state databases as of 2025, though prevention practices still apply at all access points. The fishery is bass-led, with 2 documented species across the lake's records. 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, Wisconsin DNR Surface Water, last sampled 2025-08-16. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 8 ft. Phosphorus level: 17.9 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | C |
| Phosphorus | 17.9 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 29 ft |
| Surface Area | 11 acres |
Fish Species
Click a species to see all Wisconsin and Minnesota 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: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.057 m/yr | 6 |
| Phosphorus | ↓ Declining | +2.31 µg/L/yr | 6 |
Location
County Ranking
Ranked #9 of 32 lakes in Langlade County
Nearby Lakes in Langlade County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2015. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-16
Monitoring stations: 1