Finally back on the 2016 Mountain Series stuff on Gribblenation. That being the case the next entry up on the Fall series was US 160 in Arizona. I found this route always intriguing when I lived in Arizona due to it being completely with in the Navajo Nationa between US 89 and the New Mexico State Line. The connection to AZ 64 is still obvious today with AZ 264 and AZ 564 still present.
https://www.gribblenation.org/2019/03/2016-fall-mountain-trip-part-20-us.html