Belmont Lake

On the LakeGrade scale Belmont Lake grades a B, with clarity at 13.5 ft and phosphorus readings still being added placing it above the Minnesota median. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI value of 40 puts Belmont Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. A maximum depth of 34 ft puts Belmont Lake in the middle of Minnesota's depth distribution. Belmont Lake covers 285 acres alongside 4.3 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Belmont Lake sits at rank 58 of 97 in Otter Tail County, in the lower half of the local distribution.

No invasive species are currently listed at Belmont Lake — the lake remains off the Minnesota infested-waters roster. The fishery is bass-led, with 10 documented species across the lake's records. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.