One Lake

The LakeGrade rubric puts One Lake at a C: clarity at 7.5 ft, phosphorus readings still being added, and a TSI of 48 signal an intermediate trophic state. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Mesotrophic conditions dominate at One Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's 57 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. One Lake covers 846 acres alongside 31.6 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within Lake County's 142 graded lakes, One Lake ranks 106 — below the local median, though not at the bottom.

One Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Walleye are documented at One Lake, one of 7 fish species on record for the lake. A documented public access point at One 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.