Jeju 70K

UTMB World Series

70.0km

October 2

Jeju,

South Korea

utmb·source

Set your ITRA PI

Estimated Finish

7:26:16

ITRA PI

Segment Details

1/5

-2.0% · 0.34km · 1m+ · 8m-

240m233m

0.00km0.34km

OSM ↗

Elevation Profile

Trail 56%

1.0TDI

61.4km

73.6FlatKM

1469m+

1635m−

751max

59min

1:44

16.7km

1:09

10.3km

1:50

11.0km

1:24

9.6km

1:18

11.6km

OSM

AID

Distance

Time

Gain

Loss

Gels

Water

Salts

Segment

16.7km/16.7km

1:44/1:44

358m+

319m−

1.8×40g(70g)

1.3L

3(600mg)

26.9km/10.3km

2:54/1:09

341m+

204m−

1.2×40g(47g)

0.9L

2(400mg)

37.9km/11.0km

4:44/1:50

473m+

356m−

1.8×40g(74g)

1.4L

4(800mg)

47.5km/9.6km

6:08/1:24

471m+

363m−

1.4×40g(57g)

1.1L

3(600mg)

59.1km/11.6km

7:26/1:18

127m+

701m−

0.8×40g(32g)

1.0L

3(600mg)

AID

Distance

Time

Gels

Water

Salts

Gradient Matrix

Extra

Select a gradient

Uphill

Downhill

>40%

30%

25%

20%

15%

10%

0.5

0.3

0.2

0.3

0.5

Uphill

>40%

30%

25%

20%

15%

10%

0.2

0.3

0.5

10%

15%

20%

25%

30%

>40%

Downhill

Technical sections presentDarker — steeper and longer

Extremes

Gradient Breakdown

35% / 21.5km28% / 17.0km37% / 23.0km

Uphill

20–25%×10.3km

15–20%×10.5km

10–15%×84.5km

3–10%×1316.2km

Downhill

15–20%×10.7km

10–15%×64.5km

3–10%×1417.8km

Peaks for this course have not been detected yet.

Skyrunning · ISFSource

ISF technical requirements

Average incline2.4%> 6.0%

Steep sections (30%+)0.0%≥ 5.0%

Max altitude751 m> 2000 m

Vertical climb1469 m> 1300 m

Asphalt26.3%< 15.0%

UIAA Technical climbing0.0 kmGrade I–II

Possible levelnot enough requirements met to estimate a level

Level 10/1

Peak reachno detection

Level 20/3

Altitude ≥ 3000 m751 m

Scrambling0 m

Rocky footing0 m

Level 30/3

Via ferrata0 m

Glacier0 m

Exposed ridge0 m

About Jeju 70K

Jeju 70K is a 70.0 km ultra trail of TransJeju by UTMB 2025 in Jeju, South Korea. The race starts on October 2, 2025. The course climbs 1469 m+ and descends 1635 m−, between a low point of 59 m and a high point of 751 m. By gradient, 35% of the distance is uphill, 37% downhill and 28% flat. The longest climb runs 2.9 km at an average 8.8% grade (254 m of vertical). The longest descent runs 3.0 km at 9.9% (300 m of vertical). Surface: 56% trail, 26% road, and 8% smooth. Flat-equivalent effort: 73.6 FlatKM.

1,294 finishers completed the 2025 edition. Men's winner: Peng Tian (China) in 5:02:46. Women's winner: Aurore Dacier (France) in 5:44:07.

This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Jeju 70K.

Other distances of TransJeju by UTMB 2025Jeju 100M (148 km)·Jeju 100K (100 km)

Other editions of Jeju 70K2026

Official websitetransjeju.utmb.world