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TransJeju by UTMBJeju, South Korea🇰🇷

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TransJeju by UTMB

About TransJeju by UTMB 2026

TransJeju by UTMB 2026 was a trail race held from Fri, Oct 2, 2026 to Sun, Oct 4, 2026 in Jeju, South Korea; the start is at 21:00.

The 2026 edition is over; registration is closed. The next edition is added to the calendar automatically once the organiser announces a date.

TransJeju by UTMB is the largest ultra-distance trail event on Jeju, South Korea's volcanic island. Participants will run in Hallasan National Park (UNESCO World Heritage Site); the park is extremely diverse: at various altitudes, over 1,800 subtropical, temperate and subarctic plant species develop on top of Halla volcano (South Korea's highest mountain), it changes distinctly with the four seasons and offers runners continuously changing landscapes.

Courses

CourseDistanceElevation GainCourse file
148K148 km5000 m D+GPX
104K104 km4000 m D+GPX
60K60 km1400 m D+GPX
20K20 km508 m D+GPX

There are 4 courses: 148K (5000 m D+); 104K (4000 m D+); 60K (1400 m D+); 20K (508 m D+).

Course map and elevation profile

TransJeju by UTMB 148K course map and elevation profile with checkpoints marked
148K course
TransJeju by UTMB 104K course map and elevation profile with checkpoints marked
104K course
TransJeju by UTMB 60K course map and elevation profile with checkpoints marked
60K course
TransJeju by UTMB 20K course map and elevation profile with checkpoints marked
20K course

What the weather was on race day

  • On race day the temperature ran 15°C to 22°C, and the day stayed dry, peak wind 15 km/h (a light breeze).
  • These figures come from the measurement archive after the race, not from a forecast.
  • Sunrise 06:28, sunset 18:17.

The race is over. These figures come from the Open-Meteo measurement archive for that day, not from a forecast.

Race briefing

148K course145 km · 4814 m gain · 31% uphill · 11 aid stations
  • Steep climb (10%+)
  • Climb (3-10%)
  • Flat
  • Descent
  • Steep descent (12%+)

The published GPX measures 145 km with 4814 m of climbing, 33 m per km. The course sits between 63 m and 1931 m of altitude. 67% of the gain sits in the first half.

  • 0-7.2 km · Start → Healing Forest: 343 m up / 0 m down; the stretch climbs.
  • 7.2-20 km · Healing Forest → Yeongsil Entrance: 862 m up / 43 m down; the stretch climbs.
  • 20-29 km · Yeongsil Entrance → Eorimok Entrance: 450 m up / 743 m down; the stretch descends.
  • 29-41 km · Eorimok Entrance → Gwanumsa Entrance: 216 m up / 531 m down; the stretch descends.
  • 41-59 km · Gwanumsa Entrance → Seongpanak Entrance: 1296 m up / 1216 m down; the stretch keeps rolling.
  • 59-74 km · Seongpanak Entrance → Jeongseok Aviation Pavilion: 114 m up / 421 m down; the stretch descends.
  • 74-87 km · Jeongseok Aviation Pavilion → Gasiri: 209 m up / 381 m down; the stretch descends.
  • 87-107 km · Gasiri → Meochewat Forest Trail: 358 m up / 287 m down; the stretch keeps rolling.
  • 107-116 km · Meochewat Forest Trail → Eseungak Oreum: 298 m up / 117 m down; the stretch climbs.
  • 116-128 km · Eseungak Oreum → Seogwipo Student Camping site: 544 m up / 274 m down; the stretch climbs.
  • 128-137 km · Seogwipo Student Camping site → Healing Forest: 54 m up / 537 m down; the stretch descends.
  • 137-145 km · Healing Forest → Finish: 74 m up / 272 m down; the stretch descends.

The race climbs from the gun: 244 m over the first 5 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The backbone of the course runs from km 1 to km 23: 1609 m over 22 km at 7% average, its steepest roughly 250 m section averaging 29%. Heaviest kilometres: km 22 267 m, km 17 135 m, km 21 118 m, km 9 108 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The steepest wall stands between km 39 and km 48: 1424 m over 9.7 km at 15% average, its steepest roughly 250 m section averaging 36% on the GPX trace. It tops out at 1931 m. Heaviest kilometres: km 48 312 m, km 45 237 m, km 44 216 m, km 46 159 m. By the time you start it, about 36% of the day's climbing is behind you. Running is off the table only in the steepest roughly 250 m core; hike that part with short steps and run again once the grade eases.

The longest descent starts at km 48 and loses 1710 m by km 82 at 5% average, its steepest roughly 250 m section averaging 27%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 23 averages 33% on the GPX trace over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 206 m. If anything is left in your legs, spend it here.

The leg from Gwanumsa Entrance to Seongpanak Entrance is long and unsupported: 18 km and 1296 m of climbing with no aid in between, so leave Gwanumsa Entrance with full capacity.

  • The organiser lists 148 km; the published GPX measures 145 km. The technical course notes use the published GPX measurement.
  • This course reaches 1931 m. A separate forecast for the high-point coordinate gives 2°C to 11°C, wind up to 7 km/h (calm). It is a daily forecast for that coordinate, so arrival time can still change what you encounter.
  • Sunset is 18:17 and the finish cut-off is 10:00. A runner using the full time allowance spends the final 9 hours 28 minutes in darkness.
  • Get the headtorch out before sunset and keep spare batteries or a power bank dry and immediately accessible. A spare buried at the bottom of the pack is not an emergency spare.
  • Check reflective course markers regularly in the dark. If the markings disappear, stop moving forward, return to the last marker and confirm the route against the GPX or organiser app.
  • At cut-off pace you run into a second night. Plan the sleep question before race day: an hour gained on the first night costs two on the second.
  • Poles are strongly recommended for this profile. The course averages 33 m of gain per km and the longest climb averaging over 5% runs 22 km; if you have trained with them and the organiser allows them, use them on the climbs and stow them on runnable ground.
  • The climbing is stacked into the first half. Start easy; even with less climbing later, the descents and accumulated fatigue still have to be managed.
  • The high point is 1931 m. Coming from sea level, your heart rate and breathing shift at the same pace, so leave yourself room in the first hour.

Course-profile notes are generated from GPX grade data; terrain, rules, aid stations and weather are added only when separately sourced.

Aid stations

Key decision points

Healing Forestkm 7.2

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 13 km with 834 m of climbing.
  • Cut-off: 1h 40m after the start.

Yeongsil Entrancekm 20

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 8.4 km with 478 m of climbing.
  • A 29% pitch starts about 1 km after the station; do not enter it cooled down.
  • Cut-off: 5h 40m after the start.

Gwanumsa Entrancekm 41

  • Take hot food you digest easily and top up fluids.
  • Crew access is allowed here.
  • The heaviest leg is next: 18 km with 1354 m of climbing.
  • Cut-off: 10h 10m after the start.

Jeongseok Aviation Pavilionkm 74

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 13 km with 277 m of climbing.
  • Cut-off: 18h 40m after the start.

Gasirikm 87

  • Take hot food you digest easily and top up fluids.
  • Your drop bag waits here; work off your prepared list.
  • Crew access is allowed here.
  • A heavy leg is next: 20 km with 294 m of climbing.
  • The longest unsupported stretch starts here: 20 km. Leave with full capacity.
  • Cut-off: 21h 40m after the start.

Meochewat Forest Trailkm 107

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 9.4 km with 268 m of climbing.
  • Cut-off: 25h 40m after the start.

Eseungak Oreumkm 116

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 12 km with 383 m of climbing.
  • Cut-off: 28h after the start.

Seogwipo Student Camping sitekm 128

  • Take hot food you digest easily and top up fluids.
  • Crew access is allowed here.
  • A heavy leg is next: 9.5 km with 324 m of climbing.
  • Cut-off: 31h after the start.
  • The longest stretch between official aid stations runs from Gasiri (km 87) to Meochewat Forest Trail (km 107): 20 km, with 294 m of climbing in between. Top up at Gasiri and size what you carry to the expected duration and your own drinking rate.
  • Hot food is served at Gwanumsa Entrance (km 41) and Gasiri (km 87) and 1 more. If your stomach and race plan call for it, make this a deliberate 3-5 minute stop; do not sit down simply because hot food is available. Restart gently and let your stomach settle before lifting the effort.
  • Food is available at Healing Forest (km 7) and Yeongsil Entrance (km 20) and 6 more. Decide what you need before reaching the table; without a planned special task, collect food and fluids and leave within 60-90 seconds. Finish eating on the next calm, suitable section.
  • Drop bag at Gasiri (km 87). Write down the equipment and food you expect to replace before the race so the decision is already made when you arrive.
  • Crew support is permitted only at Gwanumsa Entrance (km 41), Gasiri (km 87), and Seogwipo Student Camping site (km 128). This is not the same as a drop bag: plan equipment and food hand-offs around these stations, then verify wristband, bag and transport rules with the organiser.
  • The last aid station is Healing Forest (km 137), leaving 11 km to the finish. After that you are on what you carry.
  • The heaviest leg runs from Gwanumsa Entrance (km 41) to Seongpanak Entrance (km 59): 18 km with 1354 m of climbing. Treat it as the slowest part of your day and get your food out before it.
  • Medical support is available at Healing Forest (km 7), Yeongsil Entrance (km 20), Eorimok Entrance (km 29), Gwanumsa Entrance (km 41), Seongpanak Entrance (km 59), Jeongseok Aviation Pavilion (km 74), Gasiri (km 87), Meochewat Forest Trail (km 107), Eseungak Oreum (km 116), Seogwipo Student Camping site (km 128), and Healing Forest (km 137). If something is wrong with your feet or your stomach, deal with it there rather than pushing on.
  • About 1 km after Yeongsil Entrance (km 20), a roughly 250 m section averaging 29% begins. Choose food you know you digest easily and fill the bottles, then enter the climb at a controlled effort.
  • The overall cut-off is 37h, including all checkpoint stops. Build the plan around the official leg budgets below, not a flat-course average pace.
  • Relative to distance and climbing, the tightest official time budget runs from Eorimok Entrance (km 29) to Gwanumsa Entrance (km 41): the official time budget is 2h for 12 km and 216 m of climbing. Station stops come out of that same budget, so do not enter the leg already behind schedule.

Official cut-off ladder

LegDistanceD+Official time budgetCloses
Start → Healing Forest7.2 km343 m1h 40mstart + 1h 40m
Healing Forest → Yeongsil Entrance13 km862 m4hstart + 5h 40m
Yeongsil Entrance → Eorimok Entrance8.4 km450 m2h 30mstart + 8h 10m
Eorimok Entrance → Gwanumsa Entrance12 km216 m2hstart + 10h 10m
Gwanumsa Entrance → Seongpanak Entrance18 km1296 m5h 30mstart + 15h 40m
Seongpanak Entrance → Jeongseok Aviation Pavilion16 km114 m3hstart + 18h 40m
Jeongseok Aviation Pavilion → Gasiri13 km209 m3hstart + 21h 40m
Gasiri → Meochewat Forest Trail20 km358 m4hstart + 25h 40m
Meochewat Forest Trail → Eseungak Oreum9.4 km298 m2h 20mstart + 28h
Eseungak Oreum → Seogwipo Student Camping site12 km544 m3hstart + 31h
Seogwipo Student Camping site → Healing Forest9.5 km54 m3hstart + 34h
Healing Forest → Jeju World-cup Stadium12 km74 m3hstart + 37h

Budgets are derived from the cut-off times published by the organiser; they are not a personal finish estimate.

StationKmFrom previousSuppliesMedicalCrewCut-off
Jeju World-cup Stadium0————Friday 21:00
Healing Forest7.27.2FoodYesNoFriday 22:40
Yeongsil Entrance2013FoodYesNoSaturday 02:40
Eorimok Entrance298.4FoodYesNoSaturday 05:10
Gwanumsa Entrance4112Hot foodYesYesSaturday 07:10
Seongpanak Entrance5918FoodYesNoSaturday 12:40
Jeongseok Aviation Pavilion7416FoodYesNoSaturday 15:40
GasiriDrop bag8713Hot foodYesYesSaturday 18:40
Meochewat Forest Trail10720FoodYesNoSaturday 22:40
Eseungak Oreum1169.4FoodYesNoSunday 01:00
Seogwipo Student Camping site12812Hot foodYesYesSunday 04:00
Healing Forest1379.5FoodYesNoSunday 07:00
Jeju World-cup Stadium14912Hot food——Sunday 10:00

Aid station details come from the list published by the organiser; confirm them at the official source before race day.

104K course103 km · 4126 m gain · 33% uphill · 8 aid stations
  • Steep climb (10%+)
  • Climb (3-10%)
  • Flat
  • Descent
  • Steep descent (12%+)

The published GPX measures 103 km with 4126 m of climbing, 40 m per km. The course sits between 59 m and 1920 m of altitude. 79% of the gain sits in the first half.

  • 0-7.2 km · Start → Healing Forest: 352 m up / 15 m down; the stretch climbs.
  • 7.2-20 km · Healing Forest → Yeongsil Entrance: 933 m up / 121 m down; the stretch climbs.
  • 20-29 km · Yeongsil Entrance → Eorimok Entrance: 446 m up / 699 m down; the stretch descends.
  • 29-41 km · Eorimok Entrance → Gwanumsa Entrance: 171 m up / 557 m down; the stretch descends.
  • 41-59 km · Gwanumsa Entrance → Seongpanak Entrance: 1353 m up / 1202 m down; the stretch climbs.
  • 59-71 km · Seongpanak Entrance → Eseungak Oreum: 73 m up / 366 m down; the stretch descends.
  • 71-82 km · Eseungak Oreum → Seogwipo Student cultural Center Camping site: 405 m up / 332 m down; the stretch keeps rolling.
  • 82-92 km · Seogwipo Student cultural Center Camping site → Healing Forest: 283 m up / 385 m down; the stretch descends.
  • 92-103 km · Healing Forest → Finish: 106 m up / 446 m down; the stretch descends.

The race climbs from the gun: 238 m over the first 5 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The backbone of the course runs from km 1 to km 23: 1585 m over 23 km at 7% average, its steepest roughly 250 m section averaging 38% on the GPX trace. Heaviest kilometres: km 22 224 m, km 23 138 m, km 17 125 m, km 20 123 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The steepest wall stands between km 39 and km 49: 1404 m over 9.6 km at 15% average, its steepest roughly 250 m section averaging 38% on the GPX trace. It tops out at 1913 m. Heaviest kilometres: km 45 228 m, km 48 218 m, km 49 200 m, km 46 198 m. By the time you start it, about 44% of the day's climbing is behind you. Running is off the table only in the steepest roughly 250 m core; hike that part with short steps and run again once the grade eases.

The longest descent starts at km 49 and loses 1497 m by km 70 at 7% average, its steepest roughly 250 m section averaging 30%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 24 averages 33% on the GPX trace over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 202 m. If anything is left in your legs, spend it here.

You reach the climb after Gwanumsa Entrance with about 557 m of descent already in your quads; treat its first half as recovery effort.

The leg from Gwanumsa Entrance to Seongpanak Entrance is long and unsupported: 18 km and 1353 m of climbing with no aid in between, so leave Gwanumsa Entrance with full capacity.

  • The organiser lists 104 km; the published GPX measures 103 km. The technical course notes use the published GPX measurement.
  • This course reaches 1920 m. A separate forecast for the high-point coordinate gives 2°C to 11°C, wind up to 7 km/h (calm). It is a daily forecast for that coordinate, so arrival time can still change what you encounter.
  • Start 05:00, sunrise 06:28: the first 1 hour 28 minutes are run in the dark. The headtorch goes on your head at the start, not in your pack.
  • Sunset is 18:17 and the finish cut-off is 10:00. A runner using the full time allowance spends the final 12 hours 11 minutes in darkness.
  • Get the headtorch out before sunset and keep spare batteries or a power bank dry and immediately accessible. A spare buried at the bottom of the pack is not an emergency spare.
  • Check reflective course markers regularly in the dark. If the markings disappear, stop moving forward, return to the last marker and confirm the route against the GPX or organiser app.
  • Poles are strongly recommended for this profile. The course averages 40 m of gain per km and the longest climb averaging over 5% runs 23 km; if you have trained with them and the organiser allows them, use them on the climbs and stow them on runnable ground.
  • The climbing is stacked into the first half. Start easy; even with less climbing later, the descents and accumulated fatigue still have to be managed.
  • The high point is 1920 m. Coming from sea level, your heart rate and breathing shift at the same pace, so leave yourself room in the first hour.

Course-profile notes are generated from GPX grade data; terrain, rules, aid stations and weather are added only when separately sourced.

Aid stations

Key decision points

Healing Forestkm 7.2

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 13 km with 935 m of climbing.
  • Cut-off: 1h 40m after the start.

Yeongsil Entrancekm 20

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 8.4 km with 444 m of climbing.
  • A 38% pitch starts about 1 km after the station; do not enter it cooled down.
  • Cut-off: 5h 40m after the start.

Gwanumsa Entrancekm 41

  • Take hot food you digest easily and top up fluids.
  • Your drop bag waits here; work off your prepared list.
  • Crew access is allowed here.
  • The heaviest leg is next: 18 km with 1366 m of climbing.
  • The longest unsupported stretch starts here: 18 km. Leave with full capacity.
  • Cut-off: 10h 10m after the start.

Eseungak Oreumkm 71

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 12 km with 409 m of climbing.
  • Cut-off: 18h 40m after the start.

Seogwipo Student cultural Center Camping sitekm 82

  • Take hot food you digest easily and top up fluids.
  • Crew access is allowed here.
  • A heavy leg is next: 9.5 km with 303 m of climbing.
  • Cut-off: 23h after the start.
  • The longest stretch between official aid stations runs from Gwanumsa Entrance (km 41) to Seongpanak Entrance (km 59): 18 km, with 1366 m of climbing in between. Top up at Gwanumsa Entrance and size what you carry to the expected duration and your own drinking rate.
  • Hot food is served at Gwanumsa Entrance (km 41) and Seogwipo Student cultural Center Camping site (km 82). If your stomach and race plan call for it, make this a deliberate 3-5 minute stop; do not sit down simply because hot food is available. Restart gently and let your stomach settle before lifting the effort.
  • Food is available at Healing Forest (km 7) and Yeongsil Entrance (km 20) and 4 more. Decide what you need before reaching the table; without a planned special task, collect food and fluids and leave within 60-90 seconds. Finish eating on the next calm, suitable section.
  • Drop bag at Gwanumsa Entrance (km 41). Write down the equipment and food you expect to replace before the race so the decision is already made when you arrive.
  • Crew support is permitted only at Start (km 0), Gwanumsa Entrance (km 41), Seogwipo Student cultural Center Camping site (km 82), and Finish (km 103). This is not the same as a drop bag: plan equipment and food hand-offs around these stations, then verify wristband, bag and transport rules with the organiser.
  • The last aid station is Healing Forest (km 92), leaving 12 km to the finish. After that you are on what you carry.
  • Another heavy leg runs from Healing Forest (km 7) to Yeongsil Entrance (km 20): 13 km with 935 m of climbing. Treat it as the slowest part of your day and get your food out before it.
  • About 1 km after Yeongsil Entrance (km 20), a roughly 250 m section averaging 38% begins. Choose food you know you digest easily and fill the bottles, then enter the climb at a controlled effort.
  • The overall cut-off is 29h, including all checkpoint stops. Build the plan around the official leg budgets below, not a flat-course average pace.
  • Relative to distance and climbing, the tightest official time budget runs from Eorimok Entrance (km 29) to Gwanumsa Entrance (km 41): the official time budget is 2h for 12 km and 171 m of climbing. Station stops come out of that same budget, so do not enter the leg already behind schedule.

Official cut-off ladder

LegDistanceD+Official time budgetCloses
Start → Healing Forest7.2 km352 m1h 40mstart + 1h 40m
Healing Forest → Yeongsil Entrance13 km933 m4hstart + 5h 40m
Yeongsil Entrance → Eorimok Entrance8.4 km446 m2h 30mstart + 8h 10m
Eorimok Entrance → Gwanumsa Entrance12 km171 m2hstart + 10h 10m
Gwanumsa Entrance → Seongpanak Entrance18 km1353 m5h 30mstart + 15h 40m
Seongpanak Entrance → Eseungak Oreum12 km73 m3hstart + 18h 40m
Eseungak Oreum → Seogwipo Student cultural Center Camping site12 km405 m4h 20mstart + 23h
Seogwipo Student cultural Center Camping site → Healing Forest9.5 km283 m3hstart + 26h
Healing Forest → Finish12 km106 m3hstart + 29h

Budgets are derived from the cut-off times published by the organiser; they are not a personal finish estimate.

StationKmFrom previousSuppliesMedicalCrewCut-off
Start0——NoYesSaturday 05:00
Healing Forest7.27.2FoodNoNoSaturday 06:40
Yeongsil Entrance2013FoodNoNoSaturday 10:40
Eorimok Entrance298.3FoodNoNoSaturday 13:10
Gwanumsa EntranceDrop bag4112Hot foodNoYesSaturday 15:10
Seongpanak Entrance5918FoodNoNoSaturday 20:40
Eseungak Oreum7112FoodNoNoSaturday 23:40
Seogwipo Student cultural Center Camping site8212Hot foodNoYesSunday 04:00
Healing Forest929.5FoodNoNoSunday 07:00
Finish10312NoneNoYesSunday 10:00

Aid station details come from the list published by the organiser; confirm them at the official source before race day.

60K course62 km · 1323 m gain · 26% uphill · 4 aid stations
  • Steep climb (10%+)
  • Climb (3-10%)
  • Flat
  • Descent
  • Steep descent (12%+)

The published GPX measures 62 km with 1323 m of climbing, 21 m per km. The course sits between 63 m and 758 m of altitude. 49% of the gain sits in the first half.

  • 0-20 km · Start → Meochewat Forest Trail: 289 m up / 325 m down; the stretch keeps rolling.
  • 20-29 km · Meochewat Forest Trail → Eseuongak Oreum: 293 m up / 93 m down; the stretch climbs.
  • 29-41 km · Eseuongak Oreum → Camping Site: 353 m up / 295 m down; the stretch keeps rolling.
  • 41-50 km · Camping Site → Healing Forest: 316 m up / 392 m down; the stretch keeps rolling.
  • 50-62 km · Healing Forest → Finish: 73 m up / 417 m down; the stretch descends.

The race climbs from the gun: 23 m over the first 4.9 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The longest drag runs from km 20 to km 27: 261 m over 6.7 km at 4% average, its steepest roughly 250 m section averaging 7%. Kilometre by kilometre: km 21 39 m, km 22 42 m, km 24 45 m, km 25 59 m, km 26 59 m, km 27 24 m. Runnable, but this is where a race gets thrown away one gear too hard.

The backbone of the course runs from km 29 to km 35: net 330 m over 6.1 km at 5% average, its steepest roughly 250 m section averaging 12%, 370 m of climbing in total with 40 m given back. Kilometre by kilometre: km 30 43 m, km 31 41 m, km 32 59 m, km 33 106 m, km 34 74 m, km 35 35 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The steepest wall stands between km 41 and km 43: 264 m over 2.6 km at 10% average, its steepest roughly 250 m section averaging 16%. Kilometre by kilometre: km 42 126 m, km 43 116 m. By the time you start it, about 71% of the day's climbing is behind you. Trying to run this costs far more than it saves. Shorten the stride, lean on the poles, keep moving.

The longest descent starts at km 47 and loses 664 m by km 59 at 5% average, its steepest roughly 250 m section averaging 12%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 37 averages 14% over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 187 m. If anything is left in your legs, spend it here.

  • The organiser lists 60 km; the published GPX measures 61.6 km. The technical course notes use the published GPX measurement.
  • This course reaches 758 m. A separate forecast for the high-point coordinate gives 9°C to 18°C, wind up to 7 km/h (calm). It is a daily forecast for that coordinate, so arrival time can still change what you encounter.
  • Sunset is 18:16 and the finish cut-off is 23:00. A runner using the full time allowance spends the final 4 hours 44 minutes in darkness.
  • Get the headtorch out before sunset and keep spare batteries or a power bank dry and immediately accessible. A spare buried at the bottom of the pack is not an emergency spare.
  • Check reflective course markers regularly in the dark. If the markings disappear, stop moving forward, return to the last marker and confirm the route against the GPX or organiser app.
  • Consider bringing poles. The course averages 21 m of gain per km and the longest climb averaging over 5% runs 6.1 km; if you have trained with them and the organiser allows them, use them on the climbs and stow them on runnable ground.
  • Point to point: the finish sits 25.8 km from the start as the crow flies. Sort the shuttle and your drop bag before race day.

Course-profile notes are generated from GPX grade data; terrain, rules, aid stations and weather are added only when separately sourced.

Aid stations

Key decision points

Meochewat Forest Trailkm 20

  • Collect food and fluids and leave within 60-90 seconds.
  • A heavy leg is next: 9.6 km with 268 m of climbing.
  • Cut-off: 4h after the start.

Eseuongak Oreumkm 29

  • Collect food and fluids and leave within 60-90 seconds.
  • The heaviest leg is next: 12 km with 387 m of climbing.
  • Cut-off: 6h 30m after the start.

Camping Sitekm 41

  • Take hot food you digest easily and top up fluids.
  • Crew access is allowed here.
  • A heavy leg is next: 9.5 km with 324 m of climbing.
  • A 16% pitch starts about 0.8 km after the station; do not enter it cooled down.
  • Cut-off: 10h after the start.
  • The longest stretch between official aid stations runs from Start (km 0) to Meochewat Forest Trail (km 20): 20 km, with 306 m of climbing in between. Top up at Start and size what you carry to the expected duration and your own drinking rate.
  • Hot food is served at Camping Site (km 41). If your stomach and race plan call for it, make this a deliberate 3-5 minute stop; do not sit down simply because hot food is available. Restart gently and let your stomach settle before lifting the effort.
  • Food is available at Meochewat Forest Trail (km 20) and Eseuongak Oreum (km 29) and 1 more. Decide what you need before reaching the table; without a planned special task, collect food and fluids and leave within 60-90 seconds. Finish eating on the next calm, suitable section.
  • Crew support is permitted only at Start (km 0), Camping Site (km 41), and Finish (km 62). This is not the same as a drop bag: plan equipment and food hand-offs around these stations, then verify wristband, bag and transport rules with the organiser.
  • The last aid station is Healing Forest (km 50), leaving 10 km to the finish. After that you are on what you carry.
  • The heaviest leg runs from Eseuongak Oreum (km 29) to Camping Site (km 41): 12 km with 387 m of climbing. Treat it as the slowest part of your day and get your food out before it.
  • About 0.8 km after Camping Site (km 41), a roughly 250 m section averaging 16% begins. Choose food you know you digest easily and fill the bottles, then enter the climb at a controlled effort.
  • The overall cut-off is 15h, including all checkpoint stops. Build the plan around the official leg budgets below, not a flat-course average pace.
  • Relative to distance and climbing, the tightest official time budget runs from Start to Meochewat Forest Trail (km 20): the official time budget is 4h for 20 km and 289 m of climbing. Station stops come out of that same budget, so do not enter the leg already behind schedule.

Official cut-off ladder

LegDistanceD+Official time budgetCloses
Start → Meochewat Forest Trail20 km289 m4hstart + 4h
Meochewat Forest Trail → Eseuongak Oreum9.6 km293 m2h 30mstart + 6h 30m
Eseuongak Oreum → Camping Site12 km353 m3h 30mstart + 10h
Camping Site → Healing Forest9.5 km316 m2h 30mstart + 12h 30m
Healing Forest → Finish12 km73 m2h 30mstart + 15h

Budgets are derived from the cut-off times published by the organiser; they are not a personal finish estimate.

StationKmFrom previousSuppliesMedicalCrewCut-off
Start0——NoYesSaturday 08:00
Meochewat Forest Trail2020FoodNoNoSaturday 12:00
Eseuongak Oreum299.6FoodNoNoSaturday 14:30
Camping Site4112Hot foodNoYesSaturday 18:00
Healing Forest509.5FoodNoNoSaturday 20:30
Finish6212NoneNoYesSaturday 23:00

Aid station details come from the list published by the organiser; confirm them at the official source before race day.

20K course19 km · 461 m gain · 13% uphill · 1 aid station
  • Steep climb (10%+)
  • Climb (3-10%)
  • Flat
  • Descent
  • Steep descent (12%+)

The published GPX measures 19 km with 461 m of climbing, 24 m per km. The course sits between 214 m and 466 m of altitude. 63% of the gain sits in the first half.

The first 1.6 km are close to flat, good for settling in. Do not set your pace here, the real course starts after.

The backbone of the course runs from km 2 to km 9: net 223 m over 7 km at 3% average, its steepest roughly 250 m section averaging 19%, 257 m of climbing in total with 34 m given back. Kilometre by kilometre: km 3 27 m, km 4 21 m, km 5 40 m, km 7 30 m, km 8 17 m, km 9 119 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The longest descent starts at km 9 and loses 238 m by km 16 at 4% average, its steepest roughly 250 m section averaging 25%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it.

The last 2.3 km are close to flat. Plan your finishing pace around that, there is nothing left to save.

  • The organiser lists 20 km; the published GPX measures 19.4 km. The technical course notes use the published GPX measurement.
  • Even at cut-off pace you finish 4 hours 16 minutes before sunset. This one is run entirely in daylight.
  • Poles are optional: 24 m of gain per km. Bring them to protect your legs, not to gain speed.
  • The climbing is stacked into the first half. Start easy; even with less climbing later, the descents and accumulated fatigue still have to be managed.
  • At km 17.3 you pass right by the finish area with 2.2 km still to go; the noise there breaks more races than the climbs do.

Course-profile notes are generated from GPX grade data; terrain, rules, aid stations and weather are added only when separately sourced.

Aid stations

Key decision points

Deer Mountainkm 12

  • Collect food and fluids and leave within 60-90 seconds.
  • A 13% pitch starts about 1.8 km after the station; do not enter it cooled down.
  • The longest stretch between official aid stations runs from Start (km 0) to Deer Mountain (km 12): 12 km, with 318 m of climbing in between. Top up at Start and size what you carry to the expected duration and your own drinking rate.
  • Food is available at Deer Mountain (km 12). Decide what you need before reaching the table; without a planned special task, collect food and fluids and leave within 60-90 seconds. Finish eating on the next calm, suitable section.
  • Crew support is permitted only at Start (km 0) and Finish (km 20). This is not the same as a drop bag: plan equipment and food hand-offs around these stations, then verify wristband, bag and transport rules with the organiser.
  • The last aid station is Deer Mountain (km 12), leaving 8 km to the finish. After that you are on what you carry.
  • Medical support is available at Deer Mountain (km 12). If something is wrong with your feet or your stomach, deal with it there rather than pushing on.
  • About 2 km after Deer Mountain (km 12), a roughly 250 m section averaging 13% begins. Choose food you know you digest easily and fill the bottles, then enter the climb at a controlled effort.
  • The overall cut-off is 4h, including all checkpoint stops. Build the plan around the official leg budgets below, not a flat-course average pace.
StationKmFrom previousSuppliesMedicalCrewCut-off
Start0——NoYesSaturday 10:00
Deer Mountain1212FoodYesNo—
Finish207.4NoneNoYesSaturday 14:00

Aid station details come from the list published by the organiser; confirm them at the official source before race day.

Calculators for this race

Cutoff planTrail effort distanceRace time predictorRace fuellingPace calculator

Registration

  • StandardWed, Mar 18, 2026Entries closed

Data sources: UTMB World Series, official site (transjeju.utmb.world) · Last checked:

Similar races

Frequently asked questions

(38)
What is TransJeju by UTMB?

TransJeju by UTMB is the largest ultra-distance trail event on Jeju, South Korea's volcanic island. Participants will run in Hallasan National Park (UNESCO World Heritage Site); the park is extremely diverse: at various altitudes, over 1,800 subtropical, temperate and subarctic plant species develop on top of Halla volcano (South Korea's highest mountain), it changes distinctly with the four seasons and offers runners continuously changing landscapes.

When is TransJeju by UTMB 2026?

TransJeju by UTMB takes place on Fri, Oct 2, 2026 - Sun, Oct 4, 2026. Start time: 21:00.

Where does TransJeju by UTMB take place?

TransJeju by UTMB takes place in Jeju, South Korea.

What are the courses and distances of TransJeju by UTMB 2026?

TransJeju by UTMB offers 4 courses: 148K (148 km, 5000 m D+); 104K (104 km, 4000 m D+); 60K (60 km, 1400 m D+); 20K (20 km, 508 m D+).

How hard is TransJeju by UTMB 2026?

Difficulty is measured in km-effort: distance plus ascent divided by 100. The 148K course covers 148 km with 5000 m of climbing, which is 198 km-effort and falls in ITRA category XL. All courses: 148K 198 km-effort (XL), 104K 144 km-effort (L), 60K 74 km-effort (S), 20K 25 km-effort (XS).

Is registration for TransJeju by UTMB 2026 open?

The 2026 edition has taken place; registration is closed. Follow the official site and Yarış Radarı for the next edition: https://yarisradari.com/en/yaris/transjeju-by-utmb

What is the official website of TransJeju by UTMB?

Official website: https://transjeju.utmb.world/

Is the TransJeju by UTMB 2026 course a loop or an out and back?

The 148K course is a single loop with a shared start and finish; measured from the GPX file it runs 145.5 km. The 104K course is a single loop with a shared start and finish; measured from the GPX file it runs 102.8 km. The 60K course is point to point, finishing 25.8 km from the start; measured from the GPX file it runs 61.6 km.

Where is the hardest climb at TransJeju by UTMB 2026?

The biggest climb on the 148K course runs from km 1 to km 23: 21.9 km for 1609 m at 7% average; its steepest roughly 250 m section averages 29%. It tops out at 1689 m.

How high does TransJeju by UTMB 2026 go?

The 148K course runs between 63 m and 1931 m with 4814 m of total climbing.

Do you need poles at TransJeju by UTMB 2026?

The 148K course averages 33 m of gain per km with a longest climb of 21.9 km, so poles help noticeably.

Do you need a headtorch at TransJeju by UTMB 2026?

148K: Sunset is 18:17 and the finish cut-off is 10:00. A runner using the full time allowance spends the final 9 hours 28 minutes in darkness. Get the headtorch out before sunset and keep spare batteries or a power bank dry and immediately accessible. A spare buried at the bottom of the pack is not an emergency spare. Check reflective course markers regularly in the dark. If the markings disappear, stop moving forward, return to the last marker and confirm the route against the GPX or organiser app. At cut-off pace you run into a second night. Plan the sleep question before race day: an hour gained on the first night costs two on the second.

What was the weather like at TransJeju by UTMB 2026?

On race day the temperature ran 15°C to 22°C, and the day stayed dry, peak wind 15 km/h. These figures come from the measurement archive.

Where are the aid stations at TransJeju by UTMB 2026?

The 148K course has 11 stations; the first at km 7 and the last at km 137. The longest gap between them is 20 km, between Gasiri and Meochewat Forest Trail.

What is served at the TransJeju by UTMB 2026 aid stations?

For the 148K course: Hot food: Gwanumsa Entrance (41. km), Gasiri (87. km), Seogwipo Student Camping site (128. km).

Is there a drop bag at TransJeju by UTMB 2026?

Yes. On the 148K course the drop bag point is Gasiri (km 87).

What are the cut-off times for the 148K at TransJeju by UTMB 2026?

On the 148K course at TransJeju by UTMB 2026 the finish cut-off is Sunday 10:00. Intermediate cut-offs: Healing Forest (km 7) Friday 22:40, Yeongsil Entrance (km 20) Saturday 02:40, Eorimok Entrance (km 29) Saturday 05:10, Gwanumsa Entrance (km 41) Saturday 07:10, Seongpanak Entrance (km 59) Saturday 12:40, Jeongseok Aviation Pavilion (km 74) Saturday 15:40, Gasiri (km 87) Saturday 18:40, Meochewat Forest Trail (km 107) Saturday 22:40, Eseungak Oreum (km 116) Sunday 01:00, Seogwipo Student Camping site (km 128) Sunday 04:00, Healing Forest (km 137) Sunday 07:00.

What are the cut-off times for the 104K at TransJeju by UTMB 2026?

On the 104K course at TransJeju by UTMB 2026 the finish cut-off is Sunday 10:00. Intermediate cut-offs: Healing Forest (km 7) Saturday 06:40, Yeongsil Entrance (km 20) Saturday 10:40, Eorimok Entrance (km 29) Saturday 13:10, Gwanumsa Entrance (km 41) Saturday 15:10, Seongpanak Entrance (km 59) Saturday 20:40, Eseungak Oreum (km 71) Saturday 23:40, Seogwipo Student cultural Center Camping site (km 82) Sunday 04:00, Healing Forest (km 92) Sunday 07:00.

What are the cut-off times for the 60K at TransJeju by UTMB 2026?

On the 60K course at TransJeju by UTMB 2026 the finish cut-off is Saturday 23:00. Intermediate cut-offs: Meochewat Forest Trail (km 20) Saturday 12:00, Eseuongak Oreum (km 29) Saturday 14:30, Camping Site (km 41) Saturday 18:00, Healing Forest (km 50) Saturday 20:30.

What are the cut-off times for the 20K at TransJeju by UTMB 2026?

On the 20K course at TransJeju by UTMB 2026 the finish cut-off is Saturday 14:00.

What time does TransJeju by UTMB 2026 start?

Known start times: 148K 21:00, 104K 05:00, 60K 08:00, 20K 10:00, local time. Confirm against the organiser's schedule in race week.

What is the time limit at TransJeju by UTMB 2026?

The finish time limit is 148K Sunday 10:00, 104K Sunday 10:00, 60K Saturday 23:00, 20K Saturday 14:00. Intermediate stations carry their own cut-offs; the full list is in the checkpoint table on this page.

Is there a GPX file for TransJeju by UTMB 2026?

Yes. The GPX files for the 148K, 104K, 60K, 20K courses can be downloaded from the course section on this page, next to the route and grade profile.

Which TransJeju by UTMB course should you choose?

The shortest option is 20K (20 km, 508 m D+) and the longest is 148K (148 km, 5000 m D+). With little trail experience the 20K is the safer start; the 148K demands an all-day effort and cut-off management.

What are the gradients like at TransJeju by UTMB 2026?

The 148K course averages 33 m of climbing per km, with 4814 m of total ascent and 4820 m of descent. The steepest kilometre averages 31%.

How runnable is the TransJeju by UTMB 2026 course?

Expect a mix of running and power hiking: 33 m of gain per km; hiking the long climbs is normal, and the longest climb runs 21.9 km.

Where is the steepest part of TransJeju by UTMB 2026?

The steepest kilometre of the 148K course averages 31% and sits inside the climb between km 39 and km 48.

How many climbs does TransJeju by UTMB 2026 have?

The 148K course has 12 distinct climbs. The biggest: km 1-23 (1609 m at 7%); km 39-48 (1424 m at 15%); km 113-120 (328 m at 5%).

Is there a long climb at TransJeju by UTMB 2026?

Yes. The longest climb runs 21.9 km from km 1, gaining 1609 m at 7% average, topping out at 1689 m.

What are the descents like at TransJeju by UTMB 2026?

There is 4820 m of descent in total. The longest drop runs 33.2 km between km 48 and km 82, losing 1710 m.

Are there flat sections at TransJeju by UTMB 2026?

Partly: about 34% of the course is near flat, the rest climbs or descends.

Is the hard part of TransJeju by UTMB 2026 early or late?

67% of the climbing sits in the first half; the day is hard early and flows later.

What is the elevation range at TransJeju by UTMB 2026?

The lowest point of the 148K course sits at 63 m and the highest at 1931 m, a range of 1868 m. Conditions change noticeably between the two, so plan clothing in layers.

Where does TransJeju by UTMB 2026 reach its high point?

The course tops out at 1931 m, reached around km 48.

Are poles mandatory at TransJeju by UTMB 2026?

The organiser has not announced a pole requirement. Based on the profile poles help noticeably.

Do you need to carry water at TransJeju by UTMB 2026?

Yes: the longest stretch without aid on the 148K course is 19.6 km, so carrying backup water is essential.

When is TransJeju by UTMB 2027?

The date for TransJeju by UTMB 2027 has not been announced yet. It will appear on this page once the organiser confirms it: https://yarisradari.com/en/yaris/transjeju-by-utmb

Will TransJeju by UTMB 2026 take place?

TransJeju by UTMB status: Completed.