Pike Lake
Washington County, WisconsinMesotrophic
Pike Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.
The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. A maximum depth of 45 ft puts Pike Lake in the middle of Wisconsin's depth distribution. The lake's 461 acres and partial shoreline records put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Pike Lake ranks 7 of 15 in Washington County — solidly in the upper half of the local distribution.
Zebra mussel presence at Pike Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. Walleye are documented at Pike Lake, one of 5 fish species on record for the lake. Public access is available — the lake is on the Wisconsin DNR public-access list. 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 2025-10-14. Grade methodology: LakeGrade methodology.
Watch Pike Lake water quality
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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 7 ft. Phosphorus level: 19.3 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | C |
| Phosphorus | 19.3 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 45 ft |
| Surface Area | 461 acres |
| Public Access | Yes |
Fish Species
Click a species to see every graded lake where it is documented.
→ Best fishing times for Pike Lake (14-day solunar calendar)
→ Is it safe to eat fish from Pike Lake? (mercury & PFAS guide)
→ Pike Lake fishing regulations (limits, seasons, special rules)
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.443 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.68 µg/L/yr | 6 |
Recreation & Access
Location
County Ranking
Ranked #7 of 15 lakes in Washington County
Cleaner Lakes Within 30 Miles
Pike Lake holds Grade B. 3 nearby lakes hold higher grades.
- ABig Cedar Lake-South Site-Near West BendWashington County · mi · Higher grade (B → A)
- ALittle Cedar LakeWashington County · mi · Higher grade (B → A)
- ABig Cedar Lake-North Site-Near West BendWashington County · mi · Higher grade (B → A)
Nearby Lakes in Washington 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 1986. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Reservoir Info (USACE NID)
Pike Lake is a man-made reservoir impounded by the Pike Lake (completed 1870), built primarily for recreation on the TRIB. RUBICON RIVER; gravity-type dam, 12 ft tall and 200 ft long.
- Surface area
- 522 ac
- Normal storage
- 1,040 ac-ft
- Max storage
- 5,740 ac-ft
- Drainage area
- 13 sq mi
- Hazard class
- Low
- Owner
- Pike Lake Advancement Association
Source: USACE National Inventory of Dams, NID ID WI00662 · Operator website
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
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2025-10-14
Monitoring stations: 1
Where to stay near Pike Lake
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