Trestle Lake

On the LakeGrade scale Trestle Lake grades a B, with clarity at 12.0 ft and phosphorus readings still being added placing it above the Minnesota median. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. Trestle Lake reaches 48 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. The lake is compact at 88 acres, with 2.1 miles of shoreline and little volume to buffer nutrient inputs. Trestle Lake sits at rank 73 of 141 in Itasca County, in the lower half of the local distribution.

No invasive species are currently listed at Trestle Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Trestle Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. 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.