Dubuque To Waterloo: Events & Things To Do Along Highway 20 Iowa | USA
Highway 20 is America’s longest highway. Stretching from Boston, Massachusetts on the East Coast, all the way to Newport, Oregon on the West Coast! It’s 3365 miles (914 miles longer than Route 66) crossing 12 States: Massachusetts, New York, Pennsylvania, Ohio, Indiana, Illinois, Iowa, Nebraska, Wyoming, Montana, Idaho and Oregon.
