Eight-year-old Beccie Shedden is planning to become the youngest person to scale Britain's three highest peaks in just 24 hours.
CBBC Newsround Online caught up with Beccie for a chat about how she got into climbing and why she enjoys it so much.
How do you feel about doing the three peaks challenge?
A little bit scared because it's going to be really, really tiring.
We're going to get someone to drive us to each mountain, so we can have a sleep and get our energy back.
I've climbed all three mountains before - I did Scafell Pike when I was six, Snowdon twice when I was seven and Ben Nevis when I was eight.
Why do you enjoy climbing so much?
I like to see all the views and you get to meet all sorts of people. I like the cameraderie.
When did you start climbing?
When I was a baby, my dad would take me up in his rucksack. My dad is a good climbing partner. He helps me. Once we were on Snowdon and I slipped, but I was roped on to my dad and I didn't fall.