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Dec 20, 2026
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The Muang Thai Chiang Mai Marathon is a night-start road marathon in northern Thailand, held on a Sunday in December before the last Sunday of the year. The marathon starts at 3:00 am at the historic Tha Phae Gate and finishes at the King Naresuan the Great Monument in Mae Rim District. The half marathon starts at 4:00 am from the same gate and finishes at the same monument, with a free songthaew service back from Mae Rim to Tha Phae Gate. A 10 km run starts at 5:00 am and a 3 km Smile Run starts at 5:20 am, both starting and finishing at Tha Phae Gate. The marathon cut-off is 10:00 am, seven hours after the start, and the half marathon cut-off is 7:30 am. The race is conducted by the event company JOG&JOY. It began on 24 December 2006 as a small event organised by Chiang Mai running enthusiasts, former pupils of Metta Suksa School at Wat Chedi Luang, who paid for it themselves. The 2026 race is the 21st edition and is dedicated to the 730th anniversary of Chiang Mai city. More than 5,000 runners from 64 countries took part in the 2025 edition.
Typical climate for the race month — an estimate, not a forecast or a race-day record
December is the cool, dry season in Chiang Mai: average highs are around 29°C and lows around 17°C, with very little rain, and the race starts in the dark at 3:00 am.
The Race
Chiang Mai
The Chiang Mai Marathon began on 24 December 2006 at Tha Phae Gate. It was started by a small group of Chiang Mai former pupils of Metta Suksa School at Wat Chedi Luang, who loved long-distance running and paid for the first events themselves. It later grew into one of the best-known marathons in Thailand.
By the 11th edition, the race had more than 10,000 entrants from 53 countries, including 2,973 foreign runners. The organisers say that, according to the Tourism Authority of Thailand, this was the largest number of foreign entrants at any marathon in Thailand.
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