About This Race
The 148-kilometer distance represents TransJezu's ultimate endurance challenge, demanding runners navigate the complete volcanic circuit with approximately 7,000 meters of elevation gain across Hallasan's diverse ecosystems. This distance requires exceptional preparation for the technical volcanic rock sections and significant temperature variations as runners ascend from subtropical coastal areas through temperate forests to the subarctic summit zone multiple times. Best suited for experienced ultra-runners with previous 100-mile experience, the 148K tests both physical resilience and mental fortitude as participants face extended periods above treeline while managing complex fueling strategies across Jeju's demanding terrain.
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.