Chris, nice list. The Burr Trail is on my to-do list this year.
One other that is on my list, but haven't gotten to yet is the Moki Dugway road (Hwy 261) in far southeast Utah. The part in the picture is dirt road, except on the corners of the switchbacks where it is paved.
“To me there is no dishonor in being wrong and learning. There is dishonor in willful ignorance and there is dishonor in disrespect.” James Hatch, former Navy Seal and current Yale student.