Distance
Climb
Start Time
Cutoff
Terrain
Difficulty
Max Runners
The SMT55 is the longest race in the Samui Trail series, covering about 55.69 km with roughly 3,413 m of climbing and descent. It starts on the evening of 7 November 2026 at 18:00, so runners spend a significant part of the race in darkness and need reliable headlamps. The race is run solo, with a 20-hour time limit and seven aid stations along the way.
Jungle trails through the forested interior of Koh Samui
Panoramic coastal vistas
Cascading waterfalls
Misty mountain summits
Seven aid stations
Night start at 18:00
Terrain
Route
Race Day
On the day
Before you enter
Other questions
The SMT55 is a solo event, so each runner competes individually and must complete the course on their own.
Yes, the SMT55 is an ITRA-listed race with a mountain level of 7 and a finisher level of 230, so results can contribute to ITRA performance index scores.
The island weather is generally pleasant in November, but the mountain tops often hold cool, misty air. Runners should expect humidity in the jungle sections and be ready for rain showers, which can make trails slippery.
No. Registration for running numbers and equipment is not available on race day.
Entry fee not listed
Check the race's registration page for pricing.Koh Samui, Thailand
Saturday, November 7, 2026
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