Jeju Trail Running 50K is a 50km ultra marathon in Seogwipo, South Korea. Distance: 50km. Elevation: 2,200m D+. Difficulty: moderate (Challenge Rating 39/100). DNF rate: 8%. Time limit: 12h. Surface: trail. Established 2015.
Jeju Trail Running 50K
Seogwipo, Jeju, South Korea
"50km around Jeju Island's volcanic landscape. Oreum, coastal cliffs, and South Korea's trail running jewel."
A volcanic island 50K on South Korea's Jeju — UNESCO-listed landscapes, volcanic cones, and dramatic coastal trails.
The Course
A loop around the volcanic landscape of Jeju Island, including sections of the famous Jeju Olle Trail. The course climbs through oreum (volcanic cones), dense forests, and along dramatic coastal cliffs. Hallasan, South Korea's highest peak, dominates the skyline throughout.
mountainous
loop
5
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
Warm, inclusive finish line with a strong community feel. Runners celebrate together regardless of finish time.
Race Day Weather
18°C
12° – 22°
70%
25%
Jeju autumn — mild and pleasant. Occasional rain. The island climate is more moderate than mainland Korea.
Stats & Records
2015
400
07:30:00
Entry
KRW 80,000
April
weeks
Lore & Trivia
South Korea's 50K runs through the mountain ridges near Seoul — a city surrounded by national parks where hiking is practically the national sport. Korean mountain culture is unique: dedicated outdoor clothing stores on every block, ajumma (grandmother) hikers in full Gore-Tex ascending peaks at dawn, and trail infrastructure that is immaculate. The 50K format connects multiple peaks on ridgeline trails where the view alternates between Seoul's skyscrapers and forested mountain wilderness.
- ▸ Jeju Island is a UNESCO World Heritage Site, recognized for its unique volcanic landscape.
- ▸ The island has over 360 oreum — parasitic volcanic cones that create a surreal landscape.
- ▸ Jeju's Olle Trail system was inspired by Spain's Camino de Santiago.
- ▸ Hallasan, visible throughout the race, is a dormant shield volcano and South Korea's highest peak at 1,950m.
- ▸ Established in 2015.
Korean mountain running culture is intense — the ajumma hikers in their full outdoor gear cheering you up the mountains are the best spectators in Asia.
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Frequently Asked Questions
How long is Jeju Trail Running 50K? +
Jeju Trail Running 50K is a 50km (50km) ultra marathon with 2,200m of elevation gain. The course is loop on trail terrain.
How hard is Jeju Trail Running 50K? +
Jeju Trail Running 50K is rated moderate with a Challenge Rating of 39/100 (Moderate). The DNF rate is 8%. Runners have 12 hours to finish.
What is the weather like at Jeju Trail Running 50K? +
Average temperature is 18°C (range 12°C to 22°C) with 70% humidity and a 25% chance of rain. Jeju autumn — mild and pleasant. Occasional rain. The island climate is more moderate than mainland Korea.
Are crew and pacers allowed at Jeju Trail Running 50K? +
No crew access is permitted. Pacers are not allowed.
What is the average finish time for Jeju Trail Running 50K? +
The average finish time is 07:30:00. About 400 runners finish each year. The DNF rate is 8%.
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