Where does ‘up north’ Wisconsin begin? We might never answer the question, but here are 5 possible ways to define it

Noted: “You’ll know you’re in the tension zone when you’re heading north and … oaks that are dominant in southern Wisconsin, such as bur, black and white, meet up abruptly with red and white pine as well as paper birch and tamarack swamps that are more characteristic of the north,” writes David Mladenoff in the Fall 2012 issue of Grow magazine, a publication of the University of Wisconsin-Madison College of Agriculture and Life Sciences.