Bangsaen21
Thailand's Platinum Label half combines a deep competitive field, controlled entry standards, and a hot coastal road challenge in Chon Buri.
Quick facts
- World Athletics Platinum Label half marathon.
- Entry pathways include qualifying standards and returning-runner access.
- Deep field attracts serious domestic and international competition.
- Warm humidity is a bigger pacing factor than the calendar month suggests.
About the Bangsaen21
Bangsaen21 is one of Southeast Asia's highest-profile stand-alone half marathons and carries World Athletics Platinum Label status. Its qualifying and returning-runner entry paths create a more performance-focused field than a typical mass-participation resort race.
Course
The dedicated 21.1K road course runs around the Bangsaen area in Chon Buri, with the organizer publishing the route as a current map. Coastal exposure and tropical conditions make disciplined effort more important than assuming the quick field guarantees an easy personal best.
Race-day weather
December remains warm and humid in coastal Thailand. An early start limits sun exposure, but heat management, fluids, and realistic pacing are central to a successful race.
Past Bangsaen21 dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, December 20, 2026 | Upcoming | — |
| 2025 | — | Completed | Open results |
| 2024 | — | Completed | Open results |
Bangsaen21 FAQ
When is the Bangsaen21?
The 2026 Bangsaen21 is on Sunday, December 20, 2026.
Found an official update?Send race details or links
Send us confirmed dates, registration links, results, live tracking, or course changes. Include the source link so runners can reach the right information.