Pearl Lake

On the LakeGrade rubric, Pearl Lake pulls an A: clarity at 10.0 ft and 18 µg/L of phosphorus put it in the top bracket for Minnesota. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Mesotrophic conditions dominate at Pearl Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. Pearl Lake is unusually deep for Minnesota at 54 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. Pearl Lake covers 280 acres alongside 3.9 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 93 graded lakes in Becker County, Pearl Lake sits at rank 29, above the county median.

Pearl Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery includes walleye alongside the lake's other 11 documented species — a notable draw for Minnesota anglers. A documented public access point at Pearl Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been recorded 17 times at Pearl Lake, with a median around Apr 23. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.