The start and finish line are at Doi Inthanon National Park HeadQuarters, Chom Thong District, Chiang Mai Province. Doi Inthanon is one of the most popular national parks in Thailand, famous for its waterfalls, trails, remote villages, exceptional sunsets and sunrise, birdwatching and all-year-round cold weather on higher elevations.

We’re set up “Support Area” in Aids station that have enough area which tolerated for your supporter

Inthanon5 & Inthanon6 will get ’Assistance’ tag that related with your race BiB in your Race Kits it for your supporter who can tolerated in support area. BTW for team cheer up also available but should’t in area of support team (reserved for only who has ‘Assistance’ tag)

Let's join the crew ! We are proud of the success of the Thailand by UTMB® race. It was impossible if without the support of a dedicated volunteer like you.

In addition to coming of the great race. They will also receive various privileges such as discounts on registration fees for Thailand by UTMB®, discounts from sponsored brands, and volunteer shirts and jackets. and free for travel, accommodation and meals.

Come join us and let's have fun.

Be part of an extraordinary adventure and share incredible emotions! You can contribute to the success of the race.

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