Sport · Central
Tanaosri Trail 2026
A long running mountain ultra on the Tanaosri range in Suan Phueng, with distances up to about 104 km.
Confirmed dates
- Dates
- Sat 19 to Sun 20 Dec 2026
- Date status
- Dates published by the organiser or an official tourism source
- Venue
- Natural Science Park, Suan Phueng
- City
- Suan Phueng
- Province
- Ratchaburi
- Region
- Central
- Category
- Sport
- When it runs
- 2026 edition on 19 to 20 December 2026
- Checked
- Tue 27 Oct 2026 against the official source
About this event
Tanaosri Trail is one of Thailand's established mountain ultras, run on the Tanaosri range along the Myanmar border in Suan Phueng, Ratchaburi. Race organiser Running Connect publishes the 2026 edition on 19 and 20 December 2026, with race kit pickup at the Natural Science Park in Suan Phueng and the main race day on Sunday 20 December. Distances run from short trail options up to about 104 km, and Suan Phueng is a popular cool season weekend base about three hours from Bangkok.
Booking
Booked around the event: hotels, passes, transfers and eSIM. Booking options for this event are being checked and will be added here.
Official source: https://www.runningconnect.com/event/TNT2026. Dates checked Tue 27 Oct 2026.