Set for 1 November 2026 at Royal Park Rajapruek in Chiang Mai, this Race Up Work-produced half marathon offers four distances with registration open. A cool-season northern Thai race in a botanical-garden setting.
Chiang Mai, Thailand · Last updated August 4, 2026
The bottom line
The Scenic Half Marathon Chiang Mai (CMSH) lives up to the 'Scenic' branding: the course runs through and around Royal Park Rajapruek, Chiang Mai's 200-hectare botanical garden at the foot of Doi Suthep mountain. Four distances (21K, 10K, 5K, 3K) with registration open, produced by Race Up Work — the same team behind the Khao Yai Marathon. November in Chiang Mai is the onset of the cool season, with morning temperatures dropping into the high teens. For runners wanting a scenic, well-produced northern Thai half marathon in a garden setting, this is a strong pick.
Royal Park Rajapruek: A Botanical Garden Race
Royal Park Rajapruek is a 200-hectare botanical garden — a world away from city-street races. [1] The venue provides a contained, scenic course environment with dedicated roads, well-maintained paths, and Doi Suthep as the western backdrop. November in Chiang Mai is the cool season, with morning temperatures in the mid-teens to low 20s.
Should You Run It?
A scenic, well-produced Chiang Mai half marathon in a botanical garden setting with cool-season conditions. Registration open. 1 November 2026. [1]