Tetagouche Lake

Tetagouche Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. The lake bottoms out at 20 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake is compact at 67 acres, with 1.8 miles of shoreline and little volume to buffer nutrient inputs. Among the 142 graded lakes in Lake County, Tetagouche Lake sits at rank 70, above the county median.

No invasive species are currently listed at Tetagouche Lake — the lake remains off the Minnesota infested-waters roster. The lake's fish records list 2 species — a varied community without one dominant gamefish. No formal public access is documented at Tetagouche 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.