Frozen Fog in the Distance Madison 7 years ago We’re not getting snow this winter, but we’ve gotten a few glimpses of frozen fog, or hoar frost, at least. Frozen fog (hoar frost) on the distant mountaintop. This was early morning, just before the sun made it over the top of the mountain covered with the frozen fog. The sky was edited to show you the fog, which I could see very well with my eyes but didn’t show up on the camera. This photo was taken a few minutes later, after the sun had risen over the top. It’s hard to see it in the photo, but the hoar frost is vaporizing and lifting off the mountaintop as steam. Share this: