TransJeju by UTMB
TransJeju by UTMB – Jeju60K
Gasiri
Race guide
Updated 18 July 2026
The Jeju60K is the middle-distance race of TransJeju by UTMB, a 60 km loop starting and finishing around Gasiri on South Korea's volcanic Jeju island. With 1,324 m of climbing and a high point of just 758 m, it is a runnable ultra by UTMB standards, trading the brutal alpine ascents of mountain events for rolling forest trails, oreum (Jeju's small volcanic cones) and a course that keeps you moving rather than grinding. Starting at 08:00 with a hard finish cut-off of 23:00, you have a 15-hour window to cover the distance. That generous ceiling makes the Jeju60K approachable for a first 60 km, but the low, rolling profile is deceptive: without long climbs to force walking breaks, the temptation is to run everything and pay for it late. This guide breaks down where the course actually asks for effort and how to manage the cut-offs.
The course and terrain
The Jeju60K starts and effectively loops back to the Gasiri area, running from 274 m at the start line out to the aid stations and home to a low finish at 81 m over 59 km of measured trail. The terrain is defined by Jeju's volcanic landscape: forest trail, the flanks of oreum, and the network of paths through areas like the Meochewat Forest Trail (16.6 km) and the Healing Forest (47.4 km). This is green, wooded, low-altitude running rather than exposed high mountain. With only 1,324 m of vertical spread over 60 km, the climbs are short and frequent rather than sustained. The highest point on course sits at 758 m, but no single checkpoint is anywhere near that, which tells you the summit is a brief high touched between aid stations rather than a long haul. Expect rolling ground, plenty of genuinely runnable sections, and a profile that rewards steady rhythm over big-mountain patience.
Where the race is decided
The signature climb is Eseuongak Oreum at 26.5 km, where the course rises to 442 m after the lower ground around the Meochewat Forest Trail (249 m at 16.6 km). This is the clearest sustained ascent on the route and comes at roughly the mid-point, so it is the moment to be disciplined: power-hike it steadily rather than burning matches, because there is still more than half the race to run. The second half undulates through the Camping Site (494 m, 37.9 km) and Healing Forest (416 m, 47.4 km) before the standout feature of the closing kilometres, a long net descent to the finish at 81 m. Dropping from around 416 m at 47.4 km to 81 m at 59 km means the last stretch is downhill, which is a gift if your quads are intact and a trap if you have run the flats too hard. Save something for that descent and you can finish fast; arrive at the Healing Forest already trashed and the drop will hurt.
Pacing and fuelling to the cut-offs
The cut-offs give useful checkpoints for pacing. From the 08:00 start you must reach Meochewat Forest Trail (16.6 km) by 12:00, Eseuongak Oreum (26.5 km) by 14:30, the Camping Site (37.9 km) by 18:00, Healing Forest (47.4 km) by 20:30 and the finish (59 km) by 23:00. The early buffer is the most comfortable: four hours to cover the first 16.6 km of mostly lower ground. It tightens through the middle, so the oreum climb at 26.5 km is the section to protect your time on. Aid spacing runs roughly 16.6 km to the first station, then legs of about 10 km, 11 km, 9.5 km and a final 11.6 km to the line. That opening 16.6 km carry is the longest gap, so start with enough fluid and calories to cover close to four hours self-sufficient. Crew can meet you at the start and again at the Camping Site (37.9 km), making that a natural point to reset nutrition, swap bottles and prepare for the undulating run-in. Plan your fuelling around consistent intake on the runnable ground rather than waiting for climbs that never really come.
Conditions to expect
Because the Jeju60K runs at low elevation with a high point of only 758 m, the dominant variables are heat, humidity and the forest footing rather than altitude or alpine cold. Jeju's wooded trails hold moisture, so expect soft, potentially slick ground on the shaded forest sections around Meochewat and the Healing Forest, and manage foot care over the full distance. Shade from the tree cover helps, but humidity can still push your fluid needs up on the exposed oreum flanks. The 15-hour window from an 08:00 start means most runners will finish in daylight or early evening, but slower finishers should carry a headtorch for the closing kilometres into the 23:00 cut-off. The low, rolling nature of the course makes it one of the more forgiving 60 km races in the UTMB series, but respect the mid-race oreum climb and the long descent home, and pace the runnable ground conservatively so you can use that downhill finish rather than survive it.
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Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-17) · official source
0 km · 274 m · Sat 08:00
16.6 km · 249 m · Sat 12:00
26.5 km · 442 m · Sat 14:30
37.9 km · 494 m · Sat 18:00
47.4 km · 416 m · Sat 20:30
59 km · 81 m · Sat 23:00
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