<<<On the Road Part I 
Drunken Chicken>>>
Just outside of Yellowstone at a Chevron station.Apparently the chicken fell off the sign six or seven times before they finally got this picture.
As Fozzy mentioned, this is also right by YellowstoneChicken on porch swing at KOA campground in Buffalo, Wyoming.
Tried to make the chicken look like one of the faces on Mt. Rushmore
Chicken meets old photo in the museum at Mt. Rushmore
On the Road Part II
Yellowstone - Liz and Chad arrived just as geyser goes off. They sprinted across the parking lot to try and get a picture of the rooster with the geyser going off, but arrived just too late.

Mt Rushmore - Chicken auditioning for role as the next head to be added to Mt. Rushmore.