Set for 2 August 2026 at Laem Charoen Public Park in Rayong, this Scenic Marathon Series event offers three distances with registration open. A Gulf-of-Thailand coastal park half marathon.
Rayong, Thailand·Last updated August 9, 2026
This edition has already taken place, and no future date is listed yet — see
other races in Thailand.
The bottom line
The Scenic Half Marathon Rayong (RSMH) brings the Scenic Marathon Series to Thailand's eastern seaboard — Laem Charoen Public Park, a coastal green space in Rayong overlooking the Gulf of Thailand. Three distances (21K, 10K, 5K) with registration open. August in Rayong is the rainy season — expect warm, humid conditions but a flat coastal course. Part of the same series that includes Chiang Mai, Krabi, and Nakhon Phanom, so the production template is proven. A solid Gulf-coast Thai half marathon with open registration.
Rayong's Coastal Park
Laem Charoen Public Park is a waterfront green space on Rayong's coast, providing a flat, scenic course with Gulf-of-Thailand views. [1] The Scenic Marathon Series' production template — proven at Chiang Mai, Krabi, and Nakhon Phanom — ensures a well-run event. August is rainy season: expect warm, humid conditions.
Should You Run It?
A Scenic Marathon Series half marathon on Thailand's eastern seaboard with open registration. 2 August 2026 at Laem Charoen Public Park, Rayong. [1]