Jeju, Jeju-teukbyeoljachido · Sunday, April 12, 2026
The Jeju Trail 100K is a 100k, 하프마라톤 (half marathon), 달리기 (running), and 트레일러닝 (trail running) event held on Sunday, April 12, 2026. It is located in Jeju, Jejudo [Cheju-do].
Listed as a UNESCO World Heritage site, the island of Jeju, south of South Korea, offers a spectacular natural setting to host the TransJeju by UTMB® 🌋. This official UTMB World Series event invites runners to traverse an island shaped by volcanism, between craters volcanic, ancient lava tubes, forests, and wild coasts. Held in the fall, the race highlights the natural and cultural wealth of Jeju, renowned for its exceptional biodiversity and contrasting landscapes. Several trail formats are offered, allowing everyone to gradually immerse themselves in this unique environment, from discovery trails to long-distance adventures.