Beccie, from Barnsley, said it was a brilliant experience.
"The best bit was walking in the dark. I'd never done that before," she said.
She prepared for her adventure by getting a good night's sleep and munching on a breakfast of bacon, eggs and beans.
"I felt a little bit scared at first, but I forgot about that as soon as we started climbing.
"I just wanted to do it. Nothing was going to stop me."