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LakeQuality
B

Loiten Lake

St. Louis County, MinnesotaLimited DataMesotrophic

Loiten Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Loiten Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake bottoms out at 49 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Loiten Lake is small — 94 acres alongside 2.2 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Loiten Lake ranks 48 of 187 in St. Louis County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Loiten Lake — the lake remains off the Minnesota infested-waters roster. The fishery is bass-led, with 3 documented species across the lake's records. No formal public access is documented at Loiten Lake — most use is by shoreline residents and their guests. 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 2023-08-07. 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 11.5 ft. Trophic State Index: 42.

MetricValueGrade
Water Clarity (Secchi Depth)11.5 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)42Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth49 ft
Surface Area93.89 acres
Shoreline Length2.2 mi
Littoral Zone24%
Public AccessNo

Fish Species

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

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

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

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

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.5 m/yr2

Location

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County Ranking

Ranked #48 of 187 lakes in St. Louis County

Nearby Lakes in St. Louis County

DNR Fisheries Survey Summary

2 surveys on file from MN DNR Fisheries. Most recent: 2015-07-20 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Largemouth Bass6.430.78 lb
Yellow Perch3.67
Rock Bass0.550.14 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.

Largemouth Bass

62 fish · 516 in · 2015-07-20
9505678910111213141516

Yellow Perch

11 fish · 11 in · 2001-08-06
11601

Rock Bass

5 fish · 46 in · 2015-07-20
420456

From the 2015-07-20 survey

A standard lake survey was completed on Loiten Lake in 2015 as part of a scheduled investigation in accordance with the Loiten Lake management plan. Loiten is a 94 acre lake located within Voyageurs National Park. It is located in the mass of land between Kabetogama and Rainy Lake, and is part of a chain of lakes…

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 Loiten Lake. 1 report 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

Most recent sample: 2023-08-07

Monitoring stations: 1