Pomme de Terre Lake

Pomme de Terre Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. The lake bottoms out at 23 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 1,816 acres, Pomme de Terre Lake is one of the larger lakes in Grant County, with 14.0 miles of shoreline supporting multiple distinct use patterns. Pomme de Terre Lake ranks 5 of 10 in Grant County — solidly in the upper half of the local distribution.

Zebra mussels have been documented at Pomme de Terre Lake, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. The fishery includes walleye among the lake's 22 documented species — a notable draw for Minnesota anglers. A documented public access point at Pomme de Terre 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.