TransJeju by UTMB takes place on Fri, Oct 2, 2026 in Jeju City, South Korea. The main route is 160 km.
- Date
- Fri, Oct 2, 2026
- Start
- Jeju City 🇰🇷
- Distance
- 160 km
- Level
- Open to all
TransJeju by UTMB is the biggest ultra distance trail event on the volcanic island Jeju, South Korea, taking runners through Hallasan National Park.
Official event pageWhat this race demands
TransJeju by UTMB requires runners to cover 160 kilometers across the volcanic terrain of Jeju Island and Hallasan National Park. Athletes must manage extreme ultra-distance fatigue and prolonged time on feet over varied volcanic trails.
Ultra Distance Endurance
Covering 160 kilometers requires exceptional aerobic capacity, pacing discipline, and resistance to muscular breakdown.
Technical Terrain Management
Traversing the volcanic terrain of Hallasan National Park places high demands on ankle stability, eccentric leg strength, and focus throughout extended hours of movement.
Given the ultra-distance duration exceeding multiple hours, athletes should target an intake of 60 to 90 grams of carbohydrates per hour to maintain energy availability and gastric stability.
Your road to race day
Race day at TransJeju by UTMB is 6 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak3 weeks · Aug 22, 2026 – Sep 11, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Sep 12, 2026 – Sep 25, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Sep 26, 2026 – Oct 2, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Similar races
Organising this race?