The person who ran up Everest twice is Kilian Jornet.
According to information from a Runners World article titled "The man who ran up Everest twice in a week - Kilian Jornet on his love of mountains," Kilian Jornet achieved the remarkable feat of running up Mount Everest twice within a single week.
Jornet is widely recognized as the world's greatest mountain runner, known for achievements that are often described as extraordinary, sometimes even supernatural. His double ascent of Everest is a prime example of his incredible endurance and skill in extreme environments.
Here's a summary of the key information:
- Name: Kilian Jornet
- Achievement: Ran up Mount Everest twice
- Timeframe (as per reference): Twice in a week
- Source Context: Described in a Runners World article highlighting his achievements in mountain running.
This feat highlights Jornet's exceptional physical capabilities and mental fortitude required for such demanding climbs at high altitudes.