The mark consists of a boomerang colored yellow. On the boomerang is an Illinois US 66 road sign colored in white and black. The boomerang also contains the mark "The First HUNDRED Miles" colored is blue and black.
ILLINOIS UNITED STATES SIXTY SIX THE FIRST HUNDRED MILES; ILLINOIS UNITED STATES SIX SIX THE FIRST HUNDRED MILES
The color(s) black, white, yellow, and blue is/are claimed as a feature of the mark.