Set for 13 December 2026 in Nakhon Phanom — a Mekong River province facing Laos — this 'Scenic Marathon' lives up to its name with riverside roads and a December date in the cool, dry Isan season. Registration details are pending, but the reliability score is high.
Nakhon Phanom, Thailand · Last updated August 4, 2026
The bottom line
The Scenic Marathon Nakhon Phanom carries a reliability score of 91 — one of the highest among unreviewed races on the calendar — which reflects strong data confidence in the date, venue, and distance structure. Set in Nakhon Phanom province, whose name translates roughly to 'city of mountains,' the race runs along the Mekong River with Laos visible across the water. December in Isan is Thailand's best running weather. Registration isn't open yet, but the high reliability score and the genuinely scenic Mekong riverside setting make this one of the more credible regional Thai marathons on the 2026 calendar.
The Setting: Nakhon Phanom's Mekong Corridor
Nakhon Phanom is a long, narrow province stretched along the Mekong River in Thailand's far northeast, with the Annamite Mountains of Laos forming the eastern horizon. [1] The race name — 'Scenic Marathon' — is earned: the Mekong riverside road is one of Thailand's most photogenic running corridors, especially at sunrise. December brings cool mornings, low humidity, and clear skies — ideal marathon conditions.
Should You Run It?
If you want a regional Thai marathon with genuine scenic value, high data confidence, and cool-season Isan conditions, the Scenic Marathon Nakhon Phanom is worth tracking. The 2026 edition is set for 13 December. [1]