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B

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.

Reviewed by LakeQuality Editorial Team · Updated

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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.

MetricValueGrade
Water Clarity (Secchi Depth)8 ftC
Phosphorus17.9 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)46Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth29 ft
Surface Area11 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).

MetricTrendChange/YearYears
Water Clarity Stable+0.057 m/yr6
Phosphorus Declining+2.31 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #9 of 32 lakes in Langlade County

Nearby Lakes in Langlade County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2015. 1 station on file (most recent sample 2025).

DNR Assessment
Excellent · Deep Headwater lake
Trophic State Index 46 (mesotrophic) · 5-year average

Fish Species (DNR-rated)

Panfish(Present)Largemouth Bass(Present)

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