Esther Lake

Esther Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Mesotrophic conditions dominate at Esther Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 35 ft puts Esther Lake in the middle of Minnesota's depth distribution. The lake is compact at 78 acres, with 3.1 miles of shoreline and little volume to buffer nutrient inputs. Among the 128 graded lakes in Cook County, Esther Lake sits at rank 43, above the county median.

Esther Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The lake's fish records list 3 species — a varied community without one dominant gamefish. Public access is available — the lake is on the Minnesota PCA public-access list. 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.