Rime ice shrouds Grandfather Mountain’s lofty peaks, as brilliant fall foliage blankets the slopes below. The morning of Thursday, Oct. 17, was particularly chilly atop Grandfather Mountain, with temperatures in the 20s and a windchill of 5 degrees Fahrenheit. Photo by Skip Sickler | Grandfather Mountain Stewardship Foundation

Rime ice occurs when temperatures dip low enough for moisture to freeze to a surface — in this case Grandfather Mountain’s spruce fir trees and other high-elevation vegetation. Meanwhile, fall foliage, seen at lower elevations in the background, offers a colorful contrast. Photo by Mikey Bard | Grandfather Mountain Stewardship Foundation