St. Croix River (Wisconsin–Minnesota)
There were vast white pine forests in the upper St. Croix river valley. They provided the forest products that built the towns along Lake St. Croix, Minneapolis and St. Paul. The St. Croix along with the forests in Red Cedar, Chippewa, and Rum valleys provided supplies for the building of Winona, Minnesota, Davenport, Iowa, Rock Island, Illinois, and St. Louis.