Bangsaen42 Chonburi Marathon
Race Day Weather
Hot start, warming through the race, high humidity
A warm 79°F start means heat management is critical — consider dialing back your goal pace by 10-20 sec/mi. Temperatures rising to 90°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. High humidity (81%) will make it harder to cool down through sweat — increase fluid intake accordingly.
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Race Info
Bangsaen42 Chonburi Marathon is an annual marathon in Bang Saen, Chon Buri, Thailand, first held in 2017. The single-distance race covers 42.195 km along the Gulf of Thailand coast, starting and finishing in front of the Bangsaen Heritage Hotel. It carries a World Athletics Elite Label and draws more than 12,000 runners, with an early morning start before sunrise to beat the tropical heat. MICE & Communication Co., Ltd. organizes the race, along with the companion Bangsaen21 half marathon held separately in December.
