Enjoy another good destination ride by taking on the relatively flat Two Harbors to Duluth Marathon route. This covers all 26.2 miles of the annual and popular marathon route in just over an hour. Filmed in the Fall as leaves were changing colors and the sun was low over Lake Superior's Western end in Minnesota, this course on Lake Superior's North Shore is one of America's most scenic routes.In our case we take it at a cyclist's pace for a great workout.