When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You might want to use "Mapquest" or a similar site to plan you route. Mapquest came up with it being 757 miles between Amarillo, TX and Kingman, AZ. And that's using slab all the way. Like others have mentioned, by riding high mileage days you really wont being having much fun or getting many good pics.