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LakeQuality
B

Lax Lake

Lake County, MinnesotaMesotrophic

On the LakeGrade scale Lax Lake grades a B, with clarity at 9.4 ft and 18 µg/L of phosphorus placing it above the Minnesota median. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

Mesotrophic conditions dominate at Lax Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 35 ft puts Lax Lake in the middle of Minnesota's depth distribution. The lake's 295 acres and 3.9 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Among the 142 graded lakes in Lake County, Lax Lake sits at rank 52, above the county median.

No invasive species are currently listed at Lax Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at Lax Lake, one of 9 fish species on record for the lake. A documented public access point at Lax Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been logged at Lax Lake more than two dozen times, putting the median around Apr 29 — a useful baseline for tracking climate trends. 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 2022-09-15. 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 9.4 ft. Phosphorus level: 18 µg/L. Trophic State Index: 45.

MetricValueGrade
Water Clarity (Secchi Depth)9.4 ftC
Phosphorus18 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)45Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth35 ft
Average Depth10 ft
Surface Area295.1 acres
Shoreline Length3.9 mi
Littoral Zone65%
Public AccessYes

Fish Species

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Lax Lake (14-day solunar calendar)

→ Is it safe to eat fish from Lax Lake? (mercury & PFAS guide)

Lax Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Declining

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.735 m/yr2

Ice Season

Historical ice data from Minnesota DNR (104 observations).

Typical Ice-Out
Apr 29
Typical Ice-In
Nov 17

Estimated open water season: 202 days

EarliestLatest
Ice-Out2000-04-05 (2000)1996-05-13 (1996)
Ice-In1988-10-29 (1988)1998-12-07 (1998)

Most recent ice-out: 2020-05-02

Location

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County Ranking

Ranked #52 of 142 lakes in Lake County

Nearby Lakes in Lake County

DNR Fisheries Survey Summary

30 surveys on file from MN DNR Fisheries. Most recent: 2025-07-21 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Largemouth Bass15.751.26 lb
Bluegill14.570.23 lb
Yellow Perch10.800.18 lb
White Sucker7.402.32 lb
CNM6.86
GOS5.82

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.

Largemouth Bass

60 fish · 419 in · 2025-06-05
950trophy 204681012141618

Bluegill

198 fish · 38 in · 2022-08-16
58290345678

Yellow Perch

38 fish · 58 in · 2022-08-16
231205678

White Sucker

36 fish · 821 in · 2022-08-16
84089101112131415161718192021

From the 2025-07-21 survey

A targeted survey of nearshore fish species in Lax Lake was conducted on July 21st-July 23rd, 2025, by Lake Biological Monitoring and Assessment (LBMA) program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing, mini-fyke nets, and seining with a 50-foot or…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Lax Lake. 4 reports on file.

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: 2022-09-15

Monitoring stations: 1