About Jungle 50K
Jungle 50K is the 55.0km trail race at Amazean Jungle Trail by UTMB 2026 (Betong, Indonesia). The race starts on April 30, 2026.
Race strategy
Hold a steady pace and save energy for every section.
- 318m descent. Go easy, save your quads.
- Steep 27% wall. Control your pace and stay focused.
- The finish is runnable. Save your legs to run it all the way.
- Long race. Control your HR and effort. Early mistakes cost the most.
- Ease into the early runnable section, save your quads on the descents until 30.3km, then run your race pace.
- Start · 0.0km–1.1km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
- Settle in · 1.1km–13.4km · Plus 1 more climb. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Running pays off here: run wherever you can.
- Work · 13.4km–27.2km · Descent of 318m averaging 10%, climb of 680m, high point 1001m. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them.
- Fade · 27.2km–37.2km · Descent of 543m averaging 17%. Plus 1 more climb and 1 descent. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them. Hike the steepest pitches. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
- Home · 37.2km–49.2km · 12.0km of runnable trail. No heroics: settle back into your own effort and hold it to the line. Running pays off here: run wherever you can.
Course
By gradient, 36% of the distance is uphill, 37% downhill and 28% flat. The longest climb runs 10.5km at an average 6.5% grade (680m of vertical). The longest descent runs 5.3km at an average 8.5% grade (445m of vertical). The steepest climb averages 26.1% over 0.5km. The steepest descent drops at 29.1% over 0.5km. Surface: 19% road and 16% smooth. Flat-equivalent effort: 74.6 FlatKM.
Poles
Poles bring little benefit here: only about 8.3km of pole-friendly terrain.
Quad damage
Quad damage risk is moderate (index 28 of 100), with 35% of the load in the first half: 2 descents deserve a plan and a couple of downhill sessions before race day.
- Ease into the early runnable section, save your quads on the descents until 30.3km, then run your race pace.
- #1 · 13.4–16.7 km · 318 m D−, -9.7% · 32.4 km ahead → control
- #2 · 27.2–30.3 km · 543 m D−, -17.4% · 18.8 km ahead → control
- 31.9–37.2 km · 445 m D−, -8.5% · 12.0 km ahead → your pace
Results
692 finishers completed the 2026 edition. Men's winner: Dorian Houze (France) in 5:10:05. Women's winner: Veronika Leng (Slovakia) in 6:02:42.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Jungle 50K.
