Good Lake
Lake County, MinnesotaLimited DataMesotrophic
Good Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. 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 near 44 places Good Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake's 51 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. At 175 acres, Good Lake fits the Minnesota median for monitored lakes, with 3.3 miles of shoreline. Among the 142 graded lakes in Lake County, Good Lake sits at rank 67, above the county median.
Good Lake has no invasive species recorded in Minnesota state databases as of 2021, though prevention practices still apply at all access points. Walleye are documented at Good Lake, one of 11 fish species on record for the lake. No formal public access is documented at Good Lake — most use is by shoreline residents and their guests. 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, Minnesota DNR LakeFinder, last sampled 2021-06-26. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 10 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 51 ft |
| Surface Area | 175.22 acres |
| Shoreline Length | 3.3 mi |
| Littoral Zone | 35% |
| Public Access | No |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Good Lake (14-day solunar calendar)
→ Is it safe to eat fish from Good Lake? (mercury & PFAS guide)
→ Good Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.395 m/yr | 4 |
Location
County Ranking
Ranked #67 of 142 lakes in Lake County
Nearby Lakes in Lake County
More Minnesota Lake Rankings
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
4 surveys on file from MN DNR Fisheries. Most recent: 2025-08-07 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Tullibee (Cisco) | 12.75 | 0.42 lb |
| CIS | 7.83 | 0.16 lb |
| Northern Pike | 5.25 | 3.64 lb |
| White Sucker | 3.11 | 2.31 lb |
| Smallmouth Bass | 1.33 | 1.94 lb |
| Black Crappie | 1.25 | 0.27 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
CIS
Northern Pike
White Sucker
Smallmouth Bass
From the 2025-08-07 survey
Temperature and dissolved oxygen measurements were collected from the deepest basin in Good Lake on August 7th, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, the most sensitive coldwater species present in this…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Good Lake. 1 report on file.
- —Fisheries Lake Survey — GoodFisheries 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
Most recent sample: 2021-06-26
Monitoring stations: 3