Middle Spunk Lake

Middle Spunk Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI near 41 places Middle Spunk Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. At 81 ft of maximum depth, Middle Spunk Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. Middle Spunk Lake covers 236 acres alongside 4.5 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Middle Spunk Lake ranks 16 of 55 in Stearns County — solidly in the upper half of the local distribution.

Middle Spunk Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. Walleye are documented at Middle Spunk Lake, one of 17 fish species on record for the lake. A documented public access point at Middle Spunk Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been recorded 9 times at Middle Spunk Lake, with a median around Apr 11. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.