Chombueng Marathon
Race Day Weather
Warm start, warming through the race
A warm 73°F start means heat management is critical — consider dialing back your goal pace by 10-20 sec/mi. Temperatures rising to 85°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 75% is worth noting for effort level, especially in later miles.
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Race Info
The Chombueng Marathon takes place in Chom Bueng, Ratchaburi Province, Thailand, starting from Muban Chom Bueng Rajabhat University. First held in 1985 as a local running event, it added its current 42.195 km marathon distance in 1999. It is a full member race of the Association of International Marathons and Distance Races, held annually in the third week of January. The marathon field starts at 3:00 AM to beat the heat, with a half marathon and 10K mini marathon starting later the same morning.
