Ottertrack Lake

Ottertrack Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Lake County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

Trophically, Ottertrack Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. The lake's 70 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. At 113 acres, Ottertrack Lake fits the Minnesota median for monitored lakes, with 3.2 miles of shoreline. Within Lake County's 159 graded waters, Ottertrack Lake sits at rank 6, near the top of the local distribution.

Ottertrack Lake has no invasive species recorded in Minnesota state databases as of 2025, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Ottertrack Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.