Legend Lake
Menominee County, WisconsinMesotrophic
Legend Lake sits at the top of the Wisconsin DNR grading rubric with an A, a mark reached by the cleanest lakes in Wisconsin. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.
Mesotrophic conditions dominate at Legend Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. With 1,304 acres of surface and partial shoreline records, Legend Lake is a large water by Wisconsin standards — recreational pressure is spread across a long shoreline. Among the 5 graded lakes in Menominee County, Legend Lake sits at rank 2, above the county median.
Legend Lake has no invasive species recorded in Wisconsin state databases as of 2026, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Legend Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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, Wisconsin DNR Surface Water, last sampled 2026-06-15. Grade methodology: LakeGrade methodology.
Watch Legend Lake water quality
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 10 ft. Phosphorus level: 13.5 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | B |
| Phosphorus | 13.5 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,304 acres |
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.107 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.84 µg/L/yr | 6 |
Recreation & Access
Location
County Ranking
Ranked #2 of 5 lakes in Menominee County
Nearby Lakes in Menominee County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Washington County · Clarity: 11.8 ft
Washington County · Clarity: 12.6 ft
Walworth County · Clarity: 11 ft
Waukesha County · Clarity: 11.3 ft
Walworth County · Clarity: 20.2 ft
Kenosha County · Clarity: 10 ft
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Legend Lake is a man-made reservoir impounded by the Legend Lake Number One (completed 1968), built primarily for recreation on the TR WOLF; earth-type dam, 21 ft tall and 190 ft long.
- Surface area
- 1,304 ac
- Normal storage
- 12,000 ac-ft
- Max storage
- 20,000 ac-ft
- Drainage area
- 21.8 sq mi
- Hazard class
- High
- Owner
- Legend Lake Protection and Rehabilitation District
All listed purposes: Recreation;Other.
Source: USACE National Inventory of Dams, NID ID WI00235 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2026-06-15
Monitoring stations: 11
Where to stay near Legend Lake
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