Unnamed Lake

On the LakeGrade rubric, Unnamed Lake pulls an A: clarity at 15.1 ft and 9 µg/L of phosphorus put it in the top bracket for Minnesota. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 37 puts Unnamed Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's 95 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. At 1,357 acres, Unnamed Lake is one of the larger lakes in Otter Tail County, with 8.1 miles of shoreline supporting multiple distinct use patterns. Unnamed Lake ranks 2 of 97 in Otter Tail County, putting it in the upper tier of locally monitored lakes.

An invasive species record — flowering rush — has been logged at Unnamed Lake; Minnesota PCA maintains the official infested-waters list. The fishery includes walleye alongside the lake's other 17 documented species — a notable draw for Minnesota anglers. A documented public access point at Unnamed Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.