Loop from Wyoming, Michigan down country roads into the northern part of Indiana, then west and back up to Michigan via the lake shore. Mostly rural.
Scenic ride along Lake Michigan from Grand Haven, MI to Crystal Mountain Resort. You can make it even nicer if you keep following M-22 north of Onekema. It will take longer but if you are not pressed for time it is well worth it. M-22 is one of the most beautiful motorbiking roads in Michigan.