Trident Lake

Trident Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. 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 49 places Trident Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. At only 14 ft deep, Trident Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. At 93 acres, Trident Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Within the 142 graded lakes of Lake County, Trident Lake sits at rank 116, near the bottom of the county list.

No invasive species are currently listed at Trident Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye alongside the lake's other 9 documented species — a notable draw for Minnesota anglers. No formal public access is documented at Trident Lake — most use is by shoreline residents and their guests. 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.