Bangsaen21
Race Day Weather
Warm conditions, adjust pace early
Runners will face a start temperature of 72°F, gradually cooling to 71°F by the finish. With an average humidity of 78% and dew point at 65°F, it’s advisable to start conservatively to manage heat. Expect a headwind from miles 3-6 and crosswinds at other segments, particularly challenging in the early miles. Hydration should be prioritized throughout to combat humidity.
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Race Info
Bangsaen21 is a half marathon run each December on the coast road at Bang Saen, Chon Buri Province, Thailand. The race starts before dawn in front of the Bangsaen Heritage Hotel, follows Bangsaen-Angsila Road to a turnaround at the Prayasajja Road junction and returns to the same beachfront finish. It holds a World Athletics Platinum Label, and the course records are 1:01:56 for men (Josphat Kemei, 2022) and 1:07:45 for women (Hellen Obiri, 2022). The time limit is 3 hours 30 minutes.