Langdon Lake

Langdon Lake earns an F: phosphorus readings still being added and clarity at 1.5 ft signal heavy nutrient loading from the surrounding watershed.

Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. The lake bottoms out at 38 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Langdon Lake covers 143 acres alongside 2.1 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Langdon Lake ranks 74 of 95 in Hennepin County — at the lower end of the locally monitored distribution.

Eurasian watermilfoil is established at Langdon Lake, which can dampen recreational access and pressure the native plant community. The fishery is panfish-dominated — bluegill, crappie, and sunfish among the 8 species documented for the lake. No formal public access is documented at Langdon Lake — most use is by shoreline residents and their guests. The lake has a partial ice record — 5 observed ice-outs, centered near Mar 31. 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.