Now, if you ask my husband, he will say the drive down from the Mauna Kea Summit was the most terrifying, but that's because he wasn't driving. He was putting his foot on the imaginery brake and reminding me about approaching curves. He also brought up the time I drove down the mountainside in Colorado in my 1974 CJ5 Jeep and asked me please not to repeat that episode.
On the other hand, I would say that driving up was more frightening, if it's scary, and it sorta was. But that's part of the excitement of driving up to the snowy Summit, you know, it's the whole package. You can see all of the fabulous photographs and read more about my adventure in my personal blog today at this link: Road to Mauna Kea Summit Opens Before Christmas.