Cross Lake
Kenosha County, WisconsinOligotrophic
Cross 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.
A TSI value of 36 puts Cross Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. A maximum depth of 35 ft puts Cross Lake in the middle of Wisconsin's depth distribution. At 89 acres, Cross Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Cross Lake sits at rank 9 of 13 in Kenosha County, in the lower half of the local distribution.
Eurasian watermilfoil has been documented at Cross Lake, requiring shoreline management to keep dense mats from crowding native vegetation. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at Cross Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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 2025-09-02. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 31.2 ft down. Phosphorus level: 16.1 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 31.2 ft | A |
| Phosphorus | 16.1 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 35 ft |
| Surface Area | 89 acres |
| Public Access | Yes |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Cross Lake (14-day solunar calendar)
→ Is it safe to eat fish from Cross Lake? (mercury & PFAS guide)
→ Cross Lake fishing regulations (limits, seasons, special rules)
Invasive Species
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.116 m/yr | 6 |
| Phosphorus | ↑ Improving | -8.88 µg/L/yr | 4 |
Recreation & Access
Location
County Ranking
Ranked #9 of 13 lakes in Kenosha County
Nearby Lakes in Kenosha County
More Wisconsin Lake Rankings
State Parks Near Cross Lake
Other Grade A Lakes in Wisconsin
Waukesha County · Clarity: 14.6 ft
Waukesha County · Clarity: 13.8 ft
Walworth County · Clarity: 19 ft
Washington County · Clarity: 12 ft
Washington County · Clarity: 12.5 ft
Walworth County · Clarity: 10.8 ft
Oligotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1989. 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
Fish and recreation data from Wisconsin DNR Lakes
Most recent sample: 2025-09-02
Monitoring stations: 1