I saw an incredible northern lights display in Bayfieid Wisconsin. Bayfield, a beautiful little town, sits on the shores of Lake Superior out on a penninsula and is the launching site for boaters to explore the Apostle Islands. Anywho, the biking up there would be wonderful in the fall. Fantastic autumn color in late September, early October. And the weather most likely would be nice, though at times unpredictable. The northern lights I saw were in late September, curtains of colored light waving across the night sky, spectacular. Wisconsin for the most part has really smooth roads and, when you get as far north as Bayfield, little traffic.