 There actually was a route 666. US Highway 666 ran from Gallup, New  Mexico, to Cortez, Colorado, the gateway to Mesa Verde NP. Most of  the route crossed the Navajo reservation and passes Ship Rock and  near four corners, the only point in the US common to four states.  The road itself still exists but has been renumbered by the New  Mexico Department of Transportation because of superstitions about  the number 666.