Amazean Jungle Thailand TUNNEL 100K (Thailand) 2026
Also known as: Amazean TUNNEL 100K
A UTMB World Series race in Betong, southern Thailand. It leaves the Betong Mongkollit Tunnel before dawn, runs through the Piyamit Tunnel and viewpoints known for seas of mist, then passes the Betong Hot Spring on the way to the town clock tower. Expect hot, humid jungle.
The course tops out at 1,161 m (low point 272 m). There are 4 big climbs: 386 m around 11–15 km; 682 m around 22–32 km; 590 m around 36–42 km; 303 m around 51–52 km. About 50% of the distance is gentle (under 5% grade). In 2026, 61% of starters finished. The median finish was about 22 h, through one night.
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Predict in detail from my Strava trainingOverview
- Date
- Sat, 2 May 2026
- Start
- 04:00
- Location
- Thailand
- Distance
- 91 km
- Elevation gain
- 3,870 m
- Time limit
- 24h
- ITRA
- 100K
- Official website
- amazean.utmb.world/races/TUNNEL100K-2026
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 11.2 km | A1 Kapae Hulu School | 11.2 km | — |
| 2 | 21.5 km | A2 Suan Palm Resort | 10.3 km | Day 1 10:006h |
| 3 | 35.7 km | A3 Ai Yoe So Village | 14.2 km | — |
| 4 | 46.2 km | A4 Ten-Thousand Flower Garden | 10.5 km | Day 1 16:0012h |
| 5 | 57.3 km | A5 Piyamit Tunnel | 11.1 km | Day 1 20:0016h |
| 6 | 65 km | A8 Betong Hot Spring | 7.7 km | — |
| 7 | 81 km | A9 Thumthong Temple | 16 km | Day 2 02:0022h |
| F | 91 km | FinishBetong Clock Tower（FINISH） | 10 km | Day 2 04:0024h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2026 results
166 starters, 101 finishers (60.8% finish rate). Finish times of those who finished:
- Fastest
- 10h 43m
- Top 10%
- 14h 53m
- Top 25%
- 17h 20m
- Median
- 21h 32m
- Top 75%
- 22h 46m
- Top 90%
- 23h 31m
- Last finisher
- 23h 46m
"Top 25%" means one in four finishers had crossed the line by this time.
Years with a different course or different cutoffs are not directly comparable.
Other races
- Amazean Jungle Thailand BETONG 100M (Thailand) 2026Fri, 1 May 2026 · Thailand · 116 km
- Amazean Jungle Thailand BETONG 100M (Thailand) 2027Fri, 30 Apr 2027 · Thailand · 116 km
- Amazean Jungle Thailand TUNNEL 100K (Thailand) 2027Sat, 1 May 2027 · Thailand · 91 km
- Chiang Mai Thailand CHIANG DAO 160 (Thailand) 2026Fri, 4 Dec 2026 · Thailand · 173 km
- Chiang Mai Thailand ELEPHANT 100 (Thailand) 2026Fri, 4 Dec 2026 · Thailand · 100 km
- Amazean Jungle Thailand JUNGLE 50K (Thailand) 2026Sat, 2 May 2026 · Thailand · 55 km
From your training log, TRAIL STATUS estimates your finish time, aid-station splits and cutoff margins for this race.
Predict my raceCompiled from each race's official information. Details can change, so always check the race's official website for the latest. Spotted a mistake? Please tell us through the contact form.
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