Big Lake

Big Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. A maximum depth of 42 ft puts Big Lake in the middle of Minnesota's depth distribution. Big Lake covers 458 acres alongside 7.5 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Big Lake ranks 22 of 55 in Stearns County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Big Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye alongside the lake's other 16 documented species — a notable draw for Minnesota anglers. Public access is available — the lake is on the Minnesota PCA public-access list. The lake has a partial ice record — 8 observed ice-outs, centered near Apr 11. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.