AIA One Billion Trail 2026: What to Know Before Saturday
AIA One Billion Day reaches Hua Hin on Saturday 21 November with a UTMB Index trail race from 5 to 50 km, then a Joey Boy concert and a wellness carnival at Arena Hua Hin.
Fifty kilometres, roughly 2,600 metres of climbing, and a Joey Boy concert at the end of it: AIA One Billion Day lands in Hua Hin on Saturday 21 November. It is the fifth edition of the health and lifestyle festival. AIA Thailand runs it with the Tourism Authority of Thailand and Prow Group, and this year the trail race is certified for UTMB Index points.
The race has been rebuilt for that status. According to Thansettakij, AIA has teamed up with Trail Master Series, a professional trail organiser, to redesign the courses and the race management. The Hua Hin course is certified for UTMB Index, a scoring system many trail runners use to qualify for bigger races. The organisers say they hope that draws runners from abroad as well as from Bangkok.
The five distances
| Distance | Format |
|---|---|
| 5 km | Fun run |
| 10 km | Individual |
| 15 km | Individual |
| 30 km | Individual or team |
| 50 km | Individual or team |
The distances come from the organiser’s announcement as reported by Thansettakij and Thai Post, which says some distances accept teams without saying which. The race site describes the signature format as a team of four, which AIA says it introduced to Thai trail running. The calendar listing at Ultra Race Calendar gives the long race as 50.6 km in a single loop with 2,597 metres of climbing, starting at 05:00. It also describes a coastal setting with ocean views, a change from the mountain routes of earlier editions.
The race base is the Wang Klai Kangwon campus of Rajamangala University of Technology Rattanakosin, according to the RunLah listing. Registration ran to 31 October, so late entries are unlikely. Anyone still hoping to run should check the organiser’s Facebook page rather than assume a place.
Map: Hitkub. Map data © OpenStreetMap contributors. Venue positions are approximate, taken from event listings.
After the finish
The party moves to Arena Hua Hin. Both Thai reports name the AOB Concert and the ALive Carnival as the second half of the day, with Joey Boy and the band Mean on the bill. The carnival adds games, wellness activities, prize draws and lifestyle stalls, and the organisers pitch it at runners, families and visitors alike. No source we found says whether the concert needs a ticket or has a set start time, so check the festival’s Facebook page for the programme.
The arena has been busy lately. The Glamping Festival there on 6 and 7 November claimed more than 10,000 visitors over two days, according to the organiser’s release. The ITF men’s M15 tennis event has also been running at the same complex this week.
Planning your Saturday
Last year’s edition, held in Nakhon Ratchasima, drew more than 4,600 participants across its activities and raised money for the Thai Red Cross and a children’s education project, per Thansettakij. That gives a rough sense of the scale to expect, though Hua Hin’s numbers have not been published.
Weather deserves a look. The Department of Disaster Prevention and Mitigation has flagged 20 to 24 November as a second heavy-rain window for southern Thailand, Bangkok Biz News reports, which covers race day. Our own rain outlook has the detail, and a muddy trail changes both the pace and the shoes. We found no announced road closures or spectator arrangements for the course, so check the organiser’s page before you drive out to watch.
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