TransJeju 100K (Jeju, Korea) 2026
Also known as: Jeju100K
An early-morning start from Jeju World Cup Stadium, linking the Yeongsil, Eorimok, Gwaneumsa and Seongpanak trailheads on the slopes of Hallasan volcano, then returning to the stadium via Eoseungsaengak oreum.
The course tops out at 1,919 m (low point 59 m). There are 3 big climbs: 1,595 m around 0–24 km; 1,415 m around 39–50 km; 344 m around 71–78 km. About 40% of the distance is gentle (under 5% grade). In 2025, 89% of starters finished. The median finish was about 22 h, through one night.
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Predict in detail from my Strava trainingOverview
- Date
- Sat, 3 Oct 2026
- Start
- 05:00
- Location
- South Korea
- Distance
- 104 km
- Elevation gain
- 4,000 m
- Time limit
- 29h
- ITRA
- 100K
- Official website
- transjeju.utmb.world/races/Jeju100K
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 7.2 km | Healing Forest | 7.2 km | Day 1 06:401h 40m |
| 2 | 20.4 km | Yeongsil Entrance | 13.2 km | Day 1 10:405h 40m |
| 3 | 28.8 km | Eorimok Entrance | 8.4 km | Day 1 13:108h 10m |
| 4 | 41 km | Gwanumsa Entrance | 12.2 km | Day 1 15:1010h 10m |
| 5 | 58.8 km | Seongpanak Entrance | 17.8 km | Day 1 20:4015h 40m |
| 6 | 71 km | Eseungak Oreum | 12.2 km | Day 1 23:4018h 40m |
| 7 | 82.8 km | Seogwipo Student cultural Center Camping site | 11.8 km | Day 2 04:0023h |
| 8 | 92.3 km | Healing Forest | 9.5 km | Day 2 07:0026h |
| F | 104 km | FINISH | 11.7 km | Day 2 10:0029h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
937 starters, 835 finishers (89.1% finish rate). Finish times of those who finished:
- Fastest
- 10h 11m
- Top 10%
- 17h 25m
- Top 25%
- 19h 40m
- Median
- 22h 21m
- Top 75%
- 25h 28m
- Top 90%
- 27h 22m
- Last finisher
- 28h 49m
"Top 25%" means one in four finishers had crossed the line by this time.
Years with a different course or different cutoffs are not directly comparable.
Other races
- TransJeju 100M (Jeju, Korea) 2026Fri, 2 Oct 2026 · South Korea · 148 km
- TransJeju 60K (Jeju, Korea) 2026Sat, 3 Oct 2026 · South Korea · 60 km
- TransJeju 20K (Jeju, Korea) 2026Sat, 3 Oct 2026 · South Korea · 20 km
- UTGD Skyrace 42 Sky Marathon 2026Sun, 14 Jun 2026 · South Korea · 42.2 km
- ULJU TRAIL NINE PEAKS 9 PEAKS 125K (Ulju, Korea) 2026Fri, 30 Oct 2026 · South Korea · 124.9 km
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