Route 66, "America's Highway" runs parallel to I-40 from time to time, but not all the way through. Dusty and I took it for several stretches from New Mexico to California.
Any motorcyclist will tell you to GET OFF the interstates to find the soul of a place and I did that whenever possible. Using my trusty Roadside America I found plenty to do along Highway 36 after leaving Colorado, beginning with They Also Ran, also known as the "Gallery of Presidential Also-Rans. "