Thailand by UTMB® is based around the highest mountain in the country, Doi Inthanon. Taking runners to the ‘rooftop of Thailand’, Doi Inthanon is one of the most popular national parks in Thailand. Located in the north-west of the country, it allows runners to get off the beaten track and experience a true adventure; crossing rivers, chasing hidden waterfalls, passing royal burial grounds and meeting the local people. Thailand by UTMB® has 5 race distances including the 100-mile Inthanon 6.