First edition of TNT organized in 2015 and now an annual event, one of the major trail race of Thailand.
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Tanaosri Trail Tanaosri Trail (TNT) is regularly held in early of December at Natural Science Park, Suan Phueng District, Ratchaburi, Thailand (GPS 13.521552, 99.245811) where is close to Kao Chon Waterfall, a part of Great Tanaosri Mountain Range, border between Thailand and Burma. 
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TNT is highly attractive trail race to experienced trail-runners in Thailand and all around the world. Becoming famous race is not because of its location that sets quite close to Bangkok and convenient to pay a visit but due to its geography advantages that got steep incline to mountaintop, offered variety scenic views and surroundings, as well as challenged  technical routes. In addition, 110K, 60K, 30K race courses are qualified by ITRA, participants who successfully completed the race will be entitled with ITRA points in order to extend individual trail-running journey.
Tanaosri Trail 2019 is a collaborative event among local parties and experienced race-organizing volunteers included of Suan-Phueng School, Natural Science Park, 1st Corps developed division of Sri Suriyawongse Barracks, Suan-Phueng Subdistrict Administrative Organization (SAO), Tanaosri SAO, Khao Kra Chom Wildfire Watch Association, Suan-Phueng Hospital, and local resident. The race is organized by Running Connect Co., Ltd.  TNT2019 has drawn its objectives into 3 points;

• Fun & Learn: Aim to offer children, youth and adults who enthuse in outdoor exercise, an opportunity to explore and learn more about nature via Natural Science Park Facility.
• Double Benefits: Beside of running activity, the designated race courses will also serve as wildfire barricade. To prepare race courses will be a contribution to the Natural Park and Wildfire Extinguish Foundation in order to reduce its annual expenses.
• Fundraising: a portion of revenue to be donated to local community.
• Follow the government policy in introducing trail running to Thai society.