Tomahawk Riverlake Nokomis

On the LakeGrade scale Tomahawk Riverlake Nokomis grades a B, with clarity at 13.1 ft and phosphorus readings still being added placing it above the Wisconsin median. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 40 places Tomahawk Riverlake Nokomis in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. A maximum depth of 33 ft puts Tomahawk Riverlake Nokomis in the middle of Wisconsin's depth distribution. At 2,274 acres, Tomahawk Riverlake Nokomis is one of the larger lakes in Oneida County, with partial shoreline records supporting multiple distinct use patterns. Tomahawk Riverlake Nokomis ranks 117 of 140 in Oneida County — at the lower end of the locally monitored distribution.

Eurasian watermilfoil is established at Tomahawk Riverlake Nokomis, which can dampen recreational access and pressure the native plant community. Walleye are documented at Tomahawk Riverlake Nokomis, one of 6 fish species on record for the lake. Public access is available — the lake is on the Wisconsin DNR public-access list. 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.