Seoul 100K
19 – 20 Sep 2026This race has already taken place
Officially: SEOUL 100K 2026
03172, Seoul, South Koreaseoul100k.com (opens in a new tab)
A 100 km ultra through Seoul starting and finishing on Gwanghwamun Square, with 50 km and 20 km races on the same course. The two longer races set off at 05:00 and run into the night.
Distances
Entry fee
KRW 120,00020K · standard entry
Entry: 100 km 280,000 won, 50 km 200,000 won, 20 km 120,000 won.
Rules and terrain
- Surface
- road
Start
50K · 100K · 20K·Gwanghwamun Square, Yukjo Madang
OpenStreetMap (opens in a new tab)Google Maps (opens in a new tab)Apple Maps (opens in a new tab)37.57278, 126.97686
Race day
- Start time
- 07:30 (Asia/Seoul) · 20K only
Editions
- 19 – 20 Sep 2026
Where this came from
- Sources
- Dates, start times, distances and entry fees from the organiser’s race information pages at seoul100k.com. Checked 7 September 2026.
- Last verified
- 7 Sep 2026
- Organised by
- IntheTrail (opens in a new tab) · Organiser · operator · verified 5 Sep 2026 (opens in a new tab)