This site provides information about invasive species in the Arrowhead of northeastern Minnesota formed by Lake and Cook counties.


The Arrowhead region is bordered by Lake Superior to the east and south, Ontario, Canada to the north and St. Louis County to the west. Approximately 85% of Cook and Lake County is public land, much of it in the Superior National Forest and state forests. Due to the large amount of public land and the accompanying outdoor recreation opportunities, there is significant movement of tourists and seasonal residents throughout the year. Although there are currently fewer invasive plant species than in many more developed areas in the Great Lakes states, the introduction and spread of invasive species poses a serious threat to the region’s resources.


There are two collaborative weed management groups working to control invasive species in the Arrowhead, the Cook County Invasives Team and the Lake County Invasives Team.

Recent Updates:

– The Cook County Invasives Team is working on a native plant project with second and third graders at Oshki Ogimaag Community School. Find out more about the project here.

Invasives Teams in the news! Invasive Species Coordinator, Laurel Wilson, was interviewed by the Cook County News Herald. Click here to read the article!

-The Invasives Teams recently created a calendar that shows the best times to apply invasive plant treatments based on flowering times in NE Minnesota. Download and print the PDF here!

-The most recent newsletters with updates on Invasives Team activities and regional invasive species information can be found here.