Rime Ice at Craggy Gardens on the Blue Ridge Parkway October 2011. Rime ice is what occurs when fog frezees on trees and bushes. It is not common, I have been at this location dozens of times and have only seen this phenomena a few times. If you are fortunate enough to find rime ice whwn the sun comes out, you will think you're in a crystal paradise. It can be Awesome !