During my drive across NW AZ, I took a short detour to check out a trail that descends down the Hurricane Cliffs. This is a short section of the famous Mormon Honeymoon Trail located off Route 1015 at the UT-AZ border.
This trail is included in Massey's trial book (Hurricane Cliffs Trail) and has a difficulty rating of 6. That's higher than I've ever driven, so I wanted to see exactly what makes it so hard. The book says the difficulty is from an off-camber section near the top.
Here's a view of this section of road in Google Earth. The yellow circle marks where I was taking photos.
I took several photos, although the slope never seems to come across on photos.