🇹🇭 Thailand: half marathons
40 races scheduled between October 2026 and August 2027. Cities with the most races: Bangkok, Chiang Mai and Nong Phai Lom. Every race lists dates, locations, distances and official links; the list is updated daily.
09JAN 27
MARATHON21K10K5K
Khao Yai MarathonMu Si · Thailand · in 80 days · 42K · US$37
09JAN 27MARATHON21K12K4.5K
Khon Kaen International MarathonKhon Kaen · Thailand · in 80 days
10JAN 27MARATHON21K10K5K
Bangkok MarathonBangkok · Thailand · in 81 days · 42K · US$75
10JAN 27HALF10K5K3K
RAM HERO RUNBangkok · Thailand · in 81 days17JAN 27
MARATHON21K10K
Chombeung MarathonChom Bueng · Thailand · in 88 days
23JAN 27MARATHON21K10K4.6K
Buriram MarathonBuri Ram · Thailand · in 94 days
31JAN 27MARATHON21K10K5K
GIVE GREEN CBD Bangkok MarathonBangkok · Thailand · in 102 days
31JAN 27MARATHON21K10K5K
เชียงราย มาราธอนChiang Rai · Thailand · in 102 days · 42K · US$36