Races
Transjeju
Jeju Island. Volcanic oreums. Hallasan views. One hundred seven kilometers of Korean island trail.
69 mi+12,083 ft-12,507 ft25 hours1,434 ft to 2,129 fttech 5/106 stationsJeju oreumsvolcanicWSER qualifierOctober
Distance69 mi
Gain+12,083 ft
Loss-12,507 ft
Altitude1,434 ft to 2,129 ft
Technicality5/10
Air50°F to 75°F
- Start1,906 ft
- High2,116 ft
- Low1,438 ft
- Finish1,483 ft
- Jeju Island at mile 0.0
- Transjeju mile 14 at mile 14, cutoff 5 hours
- Transjeju mile 28 at mile 28, cutoff 10 hours
- Transjeju mile 41 at mile 41, cutoff 15 hours
- Transjeju mile 55 at mile 55, cutoff 20 hours
- Finish South Korea at mile 69, cutoff 25 hours
Geometrycourse math
Steepest drop682 ft-6.8% over 1.9 mi
Night miles32 misunset near 17:00 local
The cruxHallasan flank trails and oreum climbs in October wind (near mile 43)
Course DNA
The Course
Transjeju runs 107 km through Jeju Island, South Korea. +12,083 ft gain and -12,507 ft loss. Surfaces skew 70% trail / 25% oreum path / 5% road. Hallasan flank trails and oreum climbs in October wind. High point near 2,129 ft. Low near 1,434 ft. October temps run 50°F to 75°F. The course rewards patience early and punishes rushed descents after mile 33.
The Work
Train for 12,083 feet of climbing across 107 km. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 25 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 5/10. Build a block that simulates the crux near mile 43.
Kit
October in Jeju Island, South Korea: plan for 50°F to 75°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 25 hours pushes past dark. Poles help on sustained climbs above mile 17. Vest capacity for 2 liters minimum. Shoes matched to 70% trail: lugs for mud, rock plate if the course turns technical after mile 33.
Race Day
Hold effort through mile 17. The field often splits on the first big climb after mile 33. Hallasan flank trails and oreum climbs in October wind near mile 43 is where time is won or lost. Walk the steep pinches. Run the flats and gentle downhills. Crew at major aids: socks, calories, ice if hot. Transitions under 5 minutes when possible. Final third is 22 miles of fatigue management. Finish with reserve for the last descent.
Results
Transjeju finish lines.
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