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Chiang Mai Thailand by UTMB 2026
Chiang Mai, Thailand, 28 Nov 2026
173 km point-to-point mountain ultra from Wat Tham Chiang Dao / Doi Luang Chiang Dao toward Chiang Mai, climbing via San Pa Kia and Doi Pha Sam Liam, passing Wat Phra Phutthabat Si Roi, Hmong village areas around Doi Pui and Monthathan Waterfall, and finishing at Chiang Mai PAO Park. Official 2026 stats list 9,800 m of elevation gain, an 8 Running Stones / Finals Access race category, and a 48-hour maximum allowed race time.
6 distances from 20 to 171 km, up to 10,027 m of climb.
Distances
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56 km: 56 km, 3369 m of climb, highest point 2149 m, 28 Nov 2026.
A 57 km loop in Doi Inthanon National Park that starts and finishes at Doi Inthanon National Park HQ and passes Doi Hua Suea, Doi Pha Tang Peak, the Twin Royal Pagodas, and the summit of Doi Inthanon.
56 km cut-off times
- B3 Mae Uam Water Resource Management Office, 28.7 km: 15:00
- B4 Mae Chaem Guard Unit, 40.1 km: 18:00
- B5 Relic of the Buddha, 47.6 km: 21:30
- Finish, 55.7 km: 23:30
56 km aid stations
- B1 Mae Klang Luang School, 8.4 km
- B2 Pha Tang Junction, 19.6 km
- B3 Mae Uam Water Resource Management Office, 28.7 km
- B4 Mae Chaem Guard Unit, 40.1 km
- B5 Relic of the Buddha, 47.6 km
On the course: medical, toilets, water.
56 km equipment
- Cap, bandana or Buff (mandatory)
- First aid kit (mandatory)
- Food (mandatory)
- Headlamp with spare cells or batteries (mandatory)
- LED/flashing light or reflective vest/belt (mandatory)
- Mobile phone (mandatory)
- Passport or ID card (mandatory)
- Personal collapsible cup (mandatory)
- Reusable bowl and spoon/spork (mandatory)
- Running pack (mandatory)
- Survival blanket (mandatory)
- Water (mandatory)
- whistle (mandatory)
- Windproof jacket with hood (mandatory)
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20 km: 20 km, 870 m of climb, highest point 1453 m, 29 Nov 2026.
INTHANON 20 is a 20 km loop course starting and finishing at Doi Inthanon National Park Headquarters. The route passes the Ban Mae Klang Luang rice terraces and is described by the organizer as running through terraced rice fields in the cool mountain air of Doi Inthanon.
20 km cut-off times
- B1 Mae Klang Luang Village, 15.9 km: 12:00
- Finish, 20.3 km: 14:00
20 km aid stations
- B6 Pha Mon Village, 9.8 km
- B1 Mae Klang Luang Village, 15.9 km
On the course: medical, toilets, water.
20 km equipment
- Collapsible cup (mandatory)
- Food reserve (800 kcal) (mandatory)
- Minimum water supply of 1 liter (mandatory)
- Mobile phone (mandatory)
- Running pack (mandatory)
- whistle (mandatory)
- Cold-weather kit if activated by the organizer before race-pack collection/check-in. (recommended)
- Hot-weather kit if activated by the organizer before race-pack collection/check-in. (recommended)
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100 km: 100 km, 5568 m of climb, highest point 1600 m, 4 Dec 2026.
A point-to-point trail running route from Wat Nhong Bua Noi through Wat Phra Phutthabat Si Roi, the Hmong village at Ban Doi Pui, Doi Mon Jam panoramas, and Mae Sa Elephant Camp, finishing at Chiang Mai PAO Park. Official race details list 100 km, 5500 m+ elevation gain, 6 Running Stones, and a 28-hour maximum race time.
100 km cut-off times
- A10 Mae Ka Piang Village, 27.9 km: 16:00
- A11 Wat Pang Hai, 37.7 km: 19:30
- A13 Maesa Elephant Camp, 57.5 km: 01:30, day 2
- A16 Montha Than Waterfall, 90.0 km: 09:30, day 2
- Finish, 99.6 km: 12:00, day 2
100 km aid stations
- A18 Wat Ban Iak, 8.6 km
- A9 Wat Phra Phutthabat Si Roi, 20.1 km
- A10 Mae Ka Piang Village, 27.9 km
- A11 Wat Pang Hai, 37.7 km
- A12 Monjam, 43.3 km
- A13 Maesa Elephant Camp, 57.5 km
- A14 Jaophorluangoppathum 7 School, 66.8 km
- A15 Wat Doi Pui, 76.7 km
- A16 Montha Than Waterfall, 90.0 km
On the course: assistance allowed, bag drop, medical, rest area, toilets, water.
100 km equipment
- 2 working headlamps (mandatory)
- Cap, bandana or Buff (mandatory)
- First-aid kit including wound care such as bandages and antiseptic wipes, plus pain relievers; NSAIDs prohibited (mandatory)
- Food; official recommendation 800 kcal, e.g. 2 gels plus 2 energy bars (mandatory)
- LED/flashing light or reflective vest/belt; reflective band of at least 2 inches accepted (mandatory)
- LiveTrail application installed and activated (mandatory)
- Mobile phone; runner reachable before/during/after race, international roaming functional, safety numbers saved, phone charged and kept on; airplane mode forbidden (mandatory)
- Personal collapsible cup, minimum 150 ml / 5 oz; bottles or flasks with lids not accepted as cup replacement (mandatory)
- Reusable bowl (mandatory)
- Running pack to carry mandatory gear throughout the race (mandatory)
- Spare cells or batteries for headlamp (mandatory)
- Survival blanket, minimum 1.40 m x 2 m (mandatory)
- Water carrying capacity/content minimum 1 liter in hydration pack or bottles; water in plastic bags/ziplock bags not permitted (mandatory)
- Waterproof jacket with hood and durable water-repellent protection (DWR) (mandatory)
- whistle (mandatory)
- Cash 500 baht (recommended)
- External battery for phone (recommended)
- GPS watch (recommended)
- Long-legged trousers or race leggings (recommended)
- Long-sleeve or arm warmers (recommended)
- Main torch/headlamp 200 lumens or more (recommended)
- Spare warm clothing (recommended)
- Sunglasses (recommended)
- Trekking poles (recommended)
- Vaseline or anti-chafing cream (recommended)
- Warm gloves (recommended)
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171 km: 171 km, 10027 m of climb, highest point 1730 m, 4 Dec 2026.
173 km point-to-point mountain ultra from Wat Tham Chiang Dao / Doi Luang Chiang Dao toward Chiang Mai, climbing via San Pa Kia and Doi Pha Sam Liam, passing Wat Phra Phutthabat Si Roi, Hmong village areas around Doi Pui and Monthathan Waterfall, and finishing at Chiang Mai PAO Park. Official 2026 stats list 9,800 m of elevation gain, an 8 Running Stones / Finals Access race category, and a 48-hour maximum allowed race time.
171 km cut-off times
- A3 Pagia Highland Research Station, 32.8 km: 19:00
- A5 Suanta Sobkai Homestay, 51.0 km: 23:00
- A7 Mae Taeng Watershed Research Station, 71.5 km: 04:00, day 2
- A10 Mae Ka Piang Village, 100.2 km: 12:30, day 2
- A11 Wat Pang Hai, 110.0 km: 16:30, day 2
- A13 Maesa Elephant Camp, 129.9 km: 23:30, day 2
- A16 Montha Than Waterfall, 162.4 km: 07:30, day 3
- Finish, 170.9 km: 10:00, day 3
171 km aid stations
- A1 Khiri Kiang Dao Garden Home, 9.3 km
- A2 Ban Mae Mae School, 22.7 km
- A3 Pagia Highland Research Station, 32.8 km
- A4 Meena Homestay Huay Kub Kab, 42.9 km
- A5 Suanta Sobkai Homestay, 51.0 km
- A6 Doi Mon Ngo, 64.5 km
- A7 Mae Taeng Watershed Research Station, 71.5 km
- A8 Pha Taek Village, 82.5 km
- A9 Wat Phraphutthabat Si Roi, 92.4 km
- A10 Mae Ka Piang Village, 100.2 km
- A11 Wat Pang Hai, 110.0 km
- A12 Monjam, 115.7 km
- A13 Maesa Elephant Camp, 129.9 km
- A14 Chao Pho Luang Upatham 7 School, 139.2 km
- A15 Wat Doi Pui, 149.1 km
- A16 Montha Than Waterfall, 162.4 km
On the course: assistance allowed, bag drop, medical, rest area, toilets, water.
171 km equipment
- Cap, bandana or Buff (mandatory)
- First aid kit including wound care such as bandages and antiseptic wipes, plus permitted pain relievers; NSAIDs prohibited by official gear text (mandatory)
- Food reserve; official recommendation 800 kcal, example 2 gels plus 2 power bars (mandatory)
- LED/flashing light or reflective vest/belt; reflective band with at least 2 inches length accepted (mandatory)
- LiveTrail application installed and activated on phone (mandatory)
- Mobile phone, fully charged, reachable at all times, international roaming where applicable, organizer safety numbers saved, phone kept on and not in airplane mode (mandatory)
- One working headlamp with spare cells/batteries; official recommendation 200 lumens or more for main torch (mandatory)
- Personal collapsible cup, minimum 150 ml / 5 oz; bottles or flasks with lids not accepted as cup substitute (mandatory)
- Reusable bowl (mandatory)
- Running pack to carry mandatory gear throughout the race (mandatory)
- Survival blanket, minimum 1.40 m x 2.00 m (mandatory)
- Water capacity / water carried: minimum 1 liter in hydration pack or bottles; plastic bags or ziplock bags not permitted for water (mandatory)
- Waterproof jacket with hood and durable water-repellent protection / DWR (mandatory)
- whistle (mandatory)
- Cold-weather kit if required by organizer before check-in (recommended)
- External battery for mobile phone (recommended)
- Hot-weather kit if required by organizer before check-in (recommended)
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62 km: 62 km, 3010 m of climb, highest point 1600 m, 5 Dec 2026.
A 63 km loop from Chiang Mai PAO Park through Doi Suthep-Pui National Park, including nature sections, Montha Than Waterfall, and hill tribe culture; the official page describes it as a popular trail running route starting and finishing at Chiang Mai PAO Park.
62 km cut-off times
- A14 Jaophorluangoppathum 7 School, 28.9 km: 14:00
- A16 Montha Than Waterfall, 52.1 km: 20:00
- Finish, 62.4 km: 22:30
62 km aid stations
- A17 King Kong Landmark, 9.0 km
- A13 Maesa Elephant Camp, 19.4 km
- A14 Jaophorluangoppathum 7 School, 28.9 km
- A15 Wat Doi Pui, 38.9 km
- A16 Montha Than Waterfall, 52.1 km
On the course: medical, toilets, water.
62 km equipment
- First-aid kit including wound-care items such as bandages/antiseptic wipes; pain relievers should comply with race rules (mandatory)
- Food reserve; official page recommends about 800 kcal, e.g. gels and bars (mandatory)
- LED/flashing light or reflective vest/belt/band (mandatory)
- Mobile phone, switched on, reachable, with organizer safety numbers saved; LiveTrail app installed/activated where required (mandatory)
- One working headlamp with spare cells/batteries; 200+ lumens recommended (mandatory)
- Personal collapsible cup, minimum 150 ml / 5 oz; bottles or flasks with lids are not accepted as a cup substitute (mandatory)
- Running pack to carry mandatory gear throughout the race (mandatory)
- Survival blanket, minimum 1.40 m x 2 m (mandatory)
- Water capacity / carried water minimum 1 liter in hydration pack or bottles (mandatory)
- Waterproof jacket with hood and durable water-repellent protection (mandatory)
- Cold-weather kit if activated by the organizer (recommended)
- External battery / power bank for phone (recommended)
- Hot-weather kit if activated by the organizer (recommended)
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25 km: 25 km, 1163 m of climb, highest point 1179 m, 6 Dec 2026.
Experience the joy of trail running through Doi Suthep-Pui National Park while earning Running Stones, featuring the scenic Montha Than Waterfall trail. The loop course starts and finishes at Chiang Mai PAO Park.
25 km cut-off times
- A16 Montha Than Waterfall, 14.6 km: 11:00
- Finish, 25.3 km: 12:30
25 km aid stations
- W4 Mae Chok Luang, 4.9 km
- A16 Montha Than Waterfall, 14.6 km
On the course: medical, toilets, water.
25 km equipment
- First aid kit (mandatory)
- Minimum 1 liter water supply (mandatory)
- Mobile phone (mandatory)
- Passport or ID card (mandatory)
- Personal cup (mandatory)
- Personal food supply (mandatory)
- Running pack (mandatory)
- whistle (mandatory)
- Cash 500 baht (recommended)
- GPS watch (recommended)
- LiveTrail app installed and activated (recommended)
- Long-sleeve or arm warmers (recommended)
- Reusable bowl (recommended)
- Spare warm clothing (recommended)
- Trekking poles (recommended)
- Windproof jacket (recommended)