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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 49 ft |
| Surface Area | 93.89 acres |
| Shoreline Length | 2.2 mi |
| Littoral Zone | 24% |
| Public Access | No |
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).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.5 m/yr | 2 |
Location
County Ranking
Ranked #48 of 187 lakes in St. Louis County
Nearby Lakes in St. Louis County
More Minnesota Lake Rankings
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 2015-07-20 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Largemouth Bass | 6.43 | 0.78 lb |
| Yellow Perch | 3.67 | — |
| Rock Bass | 0.55 | 0.14 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
Yellow Perch
Rock Bass
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…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Loiten Lake. 1 report on file.
- —Fisheries Lake Survey — LoitenFisheries 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: 2023-08-07
Monitoring stations: 1