TransJeju by UTMB 2025

There's a funny thing about pushing your limits: the moment you cross a finish line, part of you vows "never again." But then, a stubborn whisper begins, a quiet pull towards the next impossible dream.


TransJeju by UTMB 2025


After BDG Ultra 100K, my body definitely screamed for a proper break. Five weeks went by, letting my muscles heal and my mind catch up to the wild idea of doing it all again. The sharp pain from that first race slowly softened into a familiar ache, almost like an old friend I hadn't truly said goodbye to. My brain was perfectly content dreaming of endless naps, and my legs, after their strong protests, were finally considering working again. I was a 100K finisher, a title I felt both proud of and a little confused by. Honestly, I thought more rest was next, not another super long run.


But then, Trans Jeju started calling. This wasn't just "another" race to tick off my crazy list. This was personal. Korea. Ah, Korea. It's a country I deeply love, full of memories from my KAIST days in Seoul. Running here, after so long, felt like coming home, even if I'd never been to Jeju Island before.


Beyond my feelings for Korea, there was the dream. This would be my very first UTMB World Series event. If you know anything about trail running, you've probably heard of Chamonix and Mont Blanc. Running 100 miles there is my biggest dream, my ultimate goal. Trans Jeju was the important first step, exciting and a little scary, towards that dream. My tired legs, bless them, were already complaining about my big plans. But my heart was set.


Hello, Jeju!

The lessons from BDG Ultra were my best guide: how to pace myself, how important nutrition and hydration are, and how to keep my mind strong. These quiet truths I carried with me into this new adventure.


I arrived at Jeju Island on Thursday, giving me a crucial night of proper sleep. This was a true blessing, as Friday night (D-1) for a big race like this usually brings me a symphony of nerves and very little actual sleep. My friends, Ramsky and Fathan, joined me on Friday, their arrival adding an extra layer of excitement to the calm before the storm. They signed up for the 20K, their very first trail race! Seeing their excitement for their "first time" was a great boost for me, even though my "first time" was just five weeks ago, and this was way longer.


TransJeju with Ramsky & Fathan


Knowing my body was still recovering, I knew I needed the best gears. My trusty Amazfit T-Rex 3 Pro was ready to track every step and important number. My ASICS Gel Trabuco 13 gave my tired feet the grip and soft landing they needed. I knew it would be a long night, so my reliable Nitecore UT27 headlamp and power bank were packed – getting lost in the dark is never fun. And feeling good in my LICA custom jersey always helps, even if I was secretly still wondering what I'd gotten myself into.


Team Amazfit Indonesia


Arriving in Jeju, an island I'd always dreamed of seeing, felt like stepping into a beautiful picture. The air was fresh, the scenery amazing, and the UTMB event had a special energy.