Six Mile Lake

Six Mile Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Six Mile Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's 68 ft maximum depth is in the upper tier for Minnesota — deep enough for cold-water fish to find refuge in summer. At 1,323 acres, Six Mile Lake is one of the larger lakes in Cass County, with 7.8 miles of shoreline supporting multiple distinct use patterns. Within Cass County's 133 graded lakes, Six Mile Lake ranks 90 — below the local median, though not at the bottom.

Six Mile 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 Six Mile Lake, one of 16 fish species on record for the lake. A documented public access point at Six Mile Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Multiple sampling years from Minnesota PCA volunteers and partner agencies back the grade, so the letter should hold steady absent a major watershed shift.