Ultramarathons in Thailand in December 2026
13 ultramarathons in Thailand in December 2026.
5 cities
Busiest: December
From €130
Upcoming races
Your guide to ultramarathons in Thailand in December 2026
There are 13 upcoming ultramarathons in Thailand in December 2026, spread across 5 cities. Filter by distance or terrain to narrow things down, and save the races you like the look of.
Most take place in December. Next up is Chiang Mai Thailand by UTMB® - 160K in Chiang Mai on 4 December 2026.
Questions runners ask
How many ultramarathons in Thailand in December 2026 are there?
Finndu lists 13 upcoming ultramarathons in Thailand in December 2026, across 5 towns and cities. The list is updated twice a day as organisers announce new races.
When is the next one?
Chiang Mai Thailand by UTMB® in Chiang Mai, on 4 December 2026.
How much does it cost to enter?
Entry starts from US$150. Fees vary from race to race, so check each race page for its current price.