She walked up the mountain by herself although she did have a few people around - just in case.
Not only is she 100 but Bailey she's also legally blind - Truly Age is No Limit for Elsa.
She says: "I like to do things. My mother took me around the world when I was 50 which was real nice," she said. "We went by boat in those days. We stopped in Honolulu of course, then we went to Japan and stayed there for a month. We also stopped in India for a while and then came back across the Atlantic. I've even done kayaking and white water and tennis and scuba diving, and I do the trampoline on my deck. I jump on that 100 times every morning. Let me tell you, that activates every cell in your body."
The ABCNews website says:
A former occupational therapist, Bailey says the secret to her longevity is simple: "Be active. I do things my way, like skiing when I'm 100. Nobody else does that even if they have energy. And I try to eat pretty correctly, and get exercise and fresh air and sunshine."
Seemingly straightforward advice from the 100-year-old rebel, who says she always tries to be positive, because you never know what life's going to hand you.
"If you're positive you can get through it OK," said Bailey. "When you think negatively, you're putting poison on your body. Just smile. They say laughter is the best medicine there is."