Park Lake
Carlton County, MinnesotaMesotrophic
Park Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Minnesota norms.
A TSI near 46 places Park Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. A maximum depth of 16 ft puts Park Lake in the middle of Minnesota's depth distribution. Park Lake covers 381 acres alongside 3.4 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Park Lake ranks 10 of 33 in Carlton County — solidly in the upper half of the local distribution.
Park Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Walleye are documented at Park Lake, one of 13 fish species on record for the lake. A documented public access point at Park Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 17 observed ice-outs, centered near Apr 21. 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 2024-09-09. Grade methodology: LakeGrade methodology.
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: 14 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | C |
| Phosphorus | 14 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 16 ft |
| Average Depth | 5 ft |
| Surface Area | 381.27 acres |
| Shoreline Length | 3.4 mi |
| Littoral Zone | 99% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Park Lake (14-day solunar calendar)
→ Is it safe to eat fish from Park Lake? (mercury & PFAS guide)
→ Park Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.071 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.35 µg/L/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (53 observations).
Estimated open water season: 212 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-16 (2024) | 2005-05-12 (2005) |
| Ice-In | 1991-11-02 (1991) | 1998-12-09 (1998) |
Most recent ice-out: 2025-04-20
Location
County Ranking
Ranked #10 of 33 lakes in Carlton County
Nearby Lakes in Carlton County
More Minnesota Lake Rankings
State Parks Near Park Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
8 surveys on file from MN DNR Fisheries. Most recent: 2025-07-22 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 35.99 | 0.19 lb |
| Bluntnose Minnow | 12.06 | — |
| Largemouth Bass | 11.74 | 1.56 lb |
| CNM | 9.22 | — |
| Pumpkinseed | 7.62 | 0.26 lb |
| Yellow Perch | 6.03 | 0.21 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.
Bluegill
Largemouth Bass
Pumpkinseed
Yellow Perch
From the 2025-07-22 survey
Duluth Area fisheries staff conducted a targeted survey of nearshore fish species in Park Lake, located within the 1854 Ceded Territory, on July 22-23, 2025. Sampling sites were sampled for fish using backpack electrofishing and beach seines, depending on habitat conditions. Backpack electrofishing was completed at 10…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Park Lake. 4 reports on file.
- —Fisheries Lake Survey — ParkFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Park (0257)Aquatic Plant Report · MN DNR LakeFinder
- —Aquatic Plant Report — Park (2070)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — ParkPublic Water Access Sites · 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: 2024-09-09
Monitoring stations: 1