It has been hot outside. Keeping cool is important and the best way to cool off is by spending time in cold water. The lakes of the Boundary Waters are the perfect temperature for swimming right now. While Lake Superior is still pretty cold it feels mighty refreshing to take a quick dip into the big lake. If rivers are more your style then there are plenty to choose from on the North Shore. Today we chose a hike in the Kadunce for exploring and keeping cool.