Lily Lake is a 42-acre seepage lake surrounded by open bog and uplands of jack pine, paper birch, and aspen. The bog mat is similar in characteristics to those typically found in central Wisconsin. Dominant plants include sphagnum, few-seeded sedge, woolly-fruit sedge, cord-root sedge, bog birch, and leatherleaf. Among other plants present are water lobelia, slender yellow-eyed grass, horned bladderwort, narrow-leaved sundew, round-leaved sundew, and pitcher plant. Tamarack, alder, and other ericaceous species are also present. The lake has slightly acid, clear water of moderate transparency and a maximum depth of six feet. Several floating bog islands are present in the lake. Puddle ducks nest here and the lake is used by migratory birds including the common loon. Lily Lake is owned by the DNR and was designated a State Natural Area in 2007.