Anna Lake

Anna Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season.

A TSI near 42 places Anna Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. A maximum depth of 19 ft puts Anna Lake in the middle of Minnesota's depth distribution. The lake's 112 acres and 2.7 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Within Crow Wing County's 120 graded lakes, Anna Lake ranks 87 — below the local median, though not at the bottom.

No invasive species are currently listed at Anna Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Anna Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Anna Lake — most use is by shoreline residents and their guests. The lake has a partial ice record — 13 observed ice-outs, centered near Apr 19. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.