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Seoul 100K
UltraSouth KoreaSouth Korea

Seoul 100K 2027

18.09 – 19.09.2027Seoul (South Korea)Dates to be confirmed
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2 courses · 50.4–107.9 km31.3–67 mi · up to 4’847 m D+up to 15’902 ft D+

At a glance

Seoul 100K 2027 is expected from Saturday 18 to Sunday 19 September 2027 in Seoul (South Korea, South Korea), date to be confirmed by the organiser. Two distances to choose from: 50.4 and 107.9 km.

Longest course: Ultra100, 107.9 km with 4’847 m D+ (45 m per km: mountain terrain).

On Kliva, plan your pacing and nutrition for free, then send the plan to your watch.

Seoul 100K trail race featuring 100K, 50K, and 20K categories starting from Gwanghwamun Square.
From the organiser

2 courses

  1. 50.4km31.3mi

    2’700 m D+8’858 ft D+

    avg 5%

    SKY50
    UTMB Index 50K

  2. 107.9km67mi

    4’847 m D+15’902 ft D+

    avg 4%

    Ultra100
    UTMB Index 100K

GPX trace not yet published.

Race plan

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Pacing, aid stations and fueling timed to your effort on Seoul 100K, in one roadbook.

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Seoul (South Korea)

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