Pike Lake
Scott County, MinnesotaHypereutrophic
Pike Lake grades an F: water clarity, phosphorus, and chlorophyll-a all rate poorly, placing it among the most stressed lakes monitored in Minnesota. 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.
Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. Pike Lake is a shallow lake at 9 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. At 49 acres, Pike Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Within Scott County's 17 graded lakes, Pike Lake ranks 12 — below the local median, though not at the bottom.
Pike Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. The state fisheries records do not list documented species for Pike Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. 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, Minnesota DNR LakeFinder, last sampled 2023-10-10. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2 ft of visibility. Phosphorus level: 181.5 µg/L. Trophic State Index: 73.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | 181.5 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 9 ft |
| Surface Area | 48.97 acres |
| Shoreline Length | 2.3 mi |
| Littoral Zone | 100% |
| Public Access | No |
Invasive Species
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.082 m/yr | 4 |
| Phosphorus | ↓ Declining | +168.15 µg/L/yr | 3 |
Ice Season
Historical ice data from Minnesota DNR (15 observations).
Estimated open water season: 258 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2017-03-07 (2017) | 2009-03-25 (2009) |
| Ice-In | 2013-11-26 (2013) | 2009-12-04 (2009) |
Most recent ice-out: 2017-03-07
Location
County Ranking
Ranked #12 of 17 lakes in Scott County
Nearby Lakes in Scott County
More Minnesota Lake Rankings
State Parks Near Pike Lake
Other Grade F Lakes in Minnesota
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1978-07-20 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Bullhead | 0.67 | 0.6 lb |
| Yellow Perch | 0.33 | 0.1 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1978-07-20 survey
Test nettting in Pike Lake caught 2 BLB and 1 YP in 3 trap nets and numerous salamanders in the gillnet set.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Pike Lake. 1 report on file.
- —Fisheries Lake Survey — PikeFisheries Lake Survey · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate
Most recent sample: 2023-10-10
Monitoring stations: 2