An Amazean Jungle Thailand training plan has to get you ready for tropical jungle trails in Betong, in Yala province at the far south of Thailand, right on the Malaysian border. There are six races, from a 4 km night run to the Betong 100M with 5600 m of elevation gain. Here are the official figures and how to train for each format.
The short answer
- Indicative build-up: 8 to 12 weeks for the two 20K races, 16 to 20 weeks for the 50K, 6 to 9 months for the 100K and 100M.
- Peak weekly climbing as a rough guide: 1000 to 1500 m for the Mist 20K, 2000 to 2500 m for the 50K, 3000 to 4500 m for the 100K and 100M.
- Key sessions: long climbs, forest descents, long hike-run days built around hydration, a night run for the 100M.
- The defining feature: a tropical jungle setting where managing heat and hydration matters as much as the climbing.
Contents
Amazean Jungle Thailand distances and elevation
Figures below are those shown on the home page of the official Amazean Jungle Thailand by UTMB website for the upcoming edition. Every race starts at the Betong Mongkollit Tunnel.
| Race | Distance | Elevation gain | Profile / notes |
|---|---|---|---|
| Betong 100M (100M category) | 115 km | 5600 m | Late-afternoon start, finish at the Betong Clock Tower; 32 h cut-off |
| Tunnel 100K (100K category) | 91 km | 4400 m | 4 a.m. start, Jaroh Ganga and Kapae Hulu viewpoints; 24 h cut-off |
| Jungle 50K (50K category) | 56 km | 2600 m | 6 a.m. start; 15 h cut-off |
| Mist 20K (20K category) | 26 km | 1000 m | 5 a.m. start, Jaroh Ganga and Kapae Hulu viewpoints; 9 h cut-off |
| Flower 20K (20K category) | 17 km | 500 m | Shortest trail race, 7 a.m. start; 6 h cut-off |
| Sat Night Run (no category) | 4 km | 70 m | Evening run through Betong town |
Despite its closeness to Malaysia, the event takes place in Thailand, in Betong district, right on the border. It is held in late April or early May. Courses leave the Betong Mongkollit Tunnel and climb to the Jaroh Ganga and Kapae Hulu viewpoints, which the organisers highlight for their seas of mist. Southern Thailand has a tropical climate, so expect heat and high humidity, and check the forecast closer to race day.
What makes Amazean Jungle Thailand hard
Humid heat is what catches most runners from temperate climates off guard. You sweat more, recover more slowly between climbs and need more water and sodium. A pace that feels easy at home can become expensive in the jungle.
The climbing is significant too: close to 49 m of gain per kilometre on the 100M and 100K, slightly less on the 50K. Long climbs to the viewpoints alternate with forest descents that load your quads as much as your lungs.
Start times also mean head torches on almost every race: the 100M leaves in the late afternoon and runs through the night, while the 100K and Mist 20K start before dawn.
How long do you need to prepare?
Flower 20K and Mist 20K: the Flower 20K (17 km, 500 m) suits a regular runner new to trails, with around 8 weeks of preparation. The Mist 20K (26 km, 1000 m) needs 10 to 12 weeks and some hill experience.
Jungle 50K: allow 16 to 20 weeks, ideally after a trail race of 30 km or more.
Tunnel 100K and Betong 100M: plan 6 to 9 months, after at least one mountain ultra and one night race. These are guidelines; your history, recovery and available time come first.
The phases of your training plan
Base: build aerobic endurance, strength and an initial climbing volume, with one short speed session a week and a lighter week every three or four weeks.
Specific: over the last 8 to 12 weeks, stack up long climbs, forest descents and long hike-run days, and prepare for heat with a few sessions in warm conditions or extra layers, without overdoing it. Above all, test and refine a hydration plan covering water, sodium and carbs.
Taper: two to three weeks with 30 to 50% less volume. If you are travelling far, arriving a few days early helps you recover from the trip and get used to the climate.
Key sessions to train for Amazean Jungle Thailand
Long climbs at a steady effort. Three to five climbs of 10 to 15 minutes, hard but controlled, to prepare for the ascents to the viewpoints and to hold a steady effort in the heat.
The hydration long run. Several hours of hike-running with your pack and flasks, eating and drinking at fixed intervals. The aim is to confirm what your stomach tolerates and how much water and sodium you need.
Forest descents. Five to ten minute descents on forest trails, staying relaxed with short, quick steps. On tired legs and in humid conditions, precision makes the difference.
Night run, for the 100M and 100K. Once or twice in the specific phase, run several hours by head torch to test your light, night-time fuelling and alertness.
To organise these sessions week after week, RunMotion Coach, the official online coach of the UTMB World Series, builds a personalised trail or ultra plan that adapts to the sessions you complete and your schedule. Try it free for 7 days.
Build your race plan with Race Strategy
In tropical conditions, hydration mistakes are costly. Race Strategy by RunMotion calculates your strategy kilometre by kilometre, adjusting pace for gradient, altitude and terrain technicality, and gives you estimated split times at key points plus a section-by-section fuelling and hydration plan (carbs, water, sodium). The race-day weather adjustment is especially useful here. Just import the official GPX of your race.
Running Stones and the UTMB World Series
Amazean Jungle Thailand is part of the UTMB World Series: its 20K, 50K, 100K and 100M category races earn Running Stones, which improve your odds in the draw for the Chamonix finals. The exact allocation per race is shown on the official site. To fit this race into your season, see our UTMB World Series training plan guide and our tips on planning your trail running season.
FAQ
Is Amazean Jungle held in Malaysia or Thailand?
Thailand. The start is at the Betong Mongkollit Tunnel, in Betong district (Yala province), on the Malaysian border.
Are poles allowed?
Check the official race rules and gear list. If allowed, they help on the long climbs of the 100K and 100M, provided you have trained with them.
What level do I need for the Betong 100M?
With around 115 km, 5600 m of gain, a full night and a 32 h cut-off, it is for runners who have finished a mountain ultra and can handle heat. Our guide to increasing your distance explains how to build up to it.
Final word
Amazean Jungle Thailand rewards runners who pace themselves in the heat and stick to a disciplined hydration plan. At RunMotion, mountains and ultras are home ground: our founders, twin brothers Guillaume and Romain Adam, come from the Alps. For a plan built around your race, start your free 7-day RunMotion Coach trial.
Article updated by the RunMotion Coach team.
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