A place where the mountains and the city lights meet.

SEOUL 100K is the world's one and only international ultra trail running competition that combines forests, mountains, rivers and old monuments within a city that holds a population of ten million people.
Seoul's only international trail running competition, the Seoul 100K, is designed to cover all parts of the beautiful city. It includes the Bukhansan National Park,
Dobongsan and roads that circle around Seoul, as well as Han River that runs through Seoul and the historic monuments.
We hope that Seoul 100K be an opportunity to enjoy Seoul in a wider perspective.
A place where the mountains and city lights meet, Seoul.