Long Lake

On the LakeGrade scale Long Lake grades a B, with clarity at 11.8 ft and phosphorus readings still being added placing it above the Wisconsin median. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Long Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. At 54 ft of maximum depth, Long Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. At 419 acres, Long Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Among the 26 graded lakes in Price County, Long Lake sits at rank 9, above the county median.

Long Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. Walleye are documented at Long Lake, one of 6 fish species on record for the lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.