About This Race
The 104-kilometer distance represents the full UTMB World Series challenge at TransJeju, demanding comprehensive preparation for the sustained elevation changes and technical volcanic terrain that define Hallasan's complete ecosystem traverse. This distance requires runners to develop pacing strategies that account for the dramatic temperature and vegetation shifts from subtropical bases to subarctic summit conditions, making it ideal for experienced ultra-runners seeking their next UTMB qualification or those ready to step up from shorter ultra distances. The extended time on course allows for a complete immersion in Jeju's biodiversity cycles, though it demands mental resilience as runners experience the full spectrum of the island's challenging volcanic landscape.
Practical Info
CJU - Jeju International Airport
Best For
Notable Features
TransJeju offers a rare opportunity to run through a UNESCO World Heritage volcanic landscape, featuring dramatic elevation changes from sea level to South Korea's highest peak. The event showcases extraordinary biodiversity across multiple climate zones, from subtropical coastal areas to subarctic mountain forests, all within a single island setting.