Ann Lake

Ann Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. The lake bottoms out at 19 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 375 acres, Ann Lake fits the Minnesota median for monitored lakes, with 3.6 miles of shoreline. Within Wright County's 64 graded lakes, Ann Lake ranks 46 — below the local median, though not at the bottom.

No invasive species are currently listed at Ann Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye alongside the lake's other 16 documented species — a notable draw for Minnesota anglers. 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.