Bangsaen21
Bangsaen21, part of the Independent / Non-series, is a road-running race held in Bangkok, Thailand. The 2026 edition takes place on Sunday, 20 December 2026. It is run over the Half Marathon distance.

Who it's for
A solid challenge for committed running athletes.
Good fit if you…
- have done a few events and want a real challenge
Maybe not if you…
- want a big marquee event: this is a smaller, local-scale race
What should you know about Bangsaen21?
- Date
- Sunday, 20 December 2026
- Format
- Half Marathon
Need to know
When is Bangsaen21 2026?
Bangsaen21 takes place on Sunday, 20 December 2026. Dates can move year to year, so confirm the exact day on the official race page before you book travel.
How do you register for Bangsaen21?
Where does Bangsaen21 take place?
Bangkok, Thailand
FAQs
What do athletes ask about Bangsaen21?
Where is Bangsaen21 held?
Bangsaen21 is held in Bangkok, Thailand. The race page has the venue location and a map, and links straight through to the official site for the precise start area.
What distances can you race at Bangsaen21?
Bangsaen21 offers Half Marathon. Pick your distance and enter on the official site. Each format usually has its own start wave and cut-offs.
What is the terrain like at Bangsaen21?
Bangsaen21 is held on road terrain. Terrain shapes your pacing, kit, and shoe choice, so factor it into your prep. The official course page has the detailed route.
How should I train for Bangsaen21?
Training for Bangsaen21 depends on your target distance and current fitness. Most athletes follow a structured block of 12–20 weeks for a Half Marathon effort. Build a plan tailored to your race date and level with AI Training Plan (https://aitrainingplan.app).
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