Minnesota’s martens belong to the Arrowhead. All 313 records come from nine northern counties, and St. Louis County alone holds 228 of them. Lake and Cook counties, along the North Shore of Lake Superior, supply most of the rest, with records from Superior National Forest and the Boundary Waters Canoe Area Wilderness. A scattering from Aitkin, Itasca, Koochiching, and Lake of the Woods counties marks the edge, and none come from the farm and prairie country of the south and west.
A winter animal on the record
Reports climb through the cold months to a sharp February peak of 108, with January and December close behind, then drop to just 4 in July and again in August. Martens don’t hibernate. They keep hunting voles and squirrels all winter, often tunneling under the snowpack, so the winter jump is about visibility. Fresh snow shows every track, bare hardwoods open up sight lines, and martens will come to suet feeders at cabins and lodges. In summer, one slipping through thick green understory is easy to miss.
Old forest, secure footing
Martens need mature forest with real structure: standing snags, downed logs, and brush piles for dens and hunting cover. Northeastern Minnesota still has big blocks of that kind of conifer and mixed woods. The marten is native here, and NatureServe ranks it S4, apparently secure, in Minnesota. Its records rank 26th of 88 mammals in the state.
