Sagatagan Lake

Sagatagan Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Stearns County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. The lake bottoms out at 42 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Sagatagan Lake covers 227 acres alongside 6.0 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within Stearns County's 55 graded waters, Sagatagan Lake sits at rank 5, near the top of the local distribution.

Sagatagan Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. Bass fishing is part of the appeal: the species list runs to 1, anchored by largemouth and/or smallmouth bass. No formal public access is documented at Sagatagan Lake — most use is by shoreline residents and their guests. The lake has a long ice-out record — 48 observations on file, with a median ice-out around Apr 9. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.