Chiang Mai Thailand - INTHANON 50 2025
The forecast arrives five days before the start.
Here you'll find the elevation profile and an estimated finish time based on your UTMB Index.
What's your time based on your UTMB?
Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.
Predicted race time based on your UTMB Index® · smoothed times achieved by runners at your level in past editions
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Cut-off times and crew - Chiang Mai Thailand - INTHANON 50 · 2025
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| B1 Pha Mon Mai Village | 10.0 | 0 m | 10.0 | 574 m | 639 m | — | — | — |
| B2 Mae Klang Luang Village | 16.1 | 0 m | 6.1 | 164 m | 278 m | — | Sun 10:30 AM | — |
| B3 Pha Tang Junction | 27.1 | 0 m | 11.0 | 1,229 m | 717 m | — | — | — |
| B4 Pha Tang Forest Ranger Unit | 36.5 | 0 m | 9.4 | 424 m | 503 m | — | Sun 04:15 PM | — |
| Doi Inthanon National Park HQ | 39.4 | 0 m | 3.0 | 29 m | 283 m | — | Sun 05:00 PM | — |
Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.
What you'll find at each aid station
Aid station contents not documented.
Elevation profile
The course and its aid stations
Chiang Mai Thailand - INTHANON 50: times, aid-station stops and fuelling needs by UTMB® Index
Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 6h20 to 3h59. These times include aid-station stops: they come from real durations between two timing points, and this race's timing does not measure stops separately.
Source| UTMB® Index | Estimated time | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|
| 500 | 6h20 | — | 380 g | 4.4 L | 3,167 mg | +3h40 |
| 550 | 5h50 | — | 350 g | 4.1 L | 2,917 mg | +4h10 |
| 600 | 5h26 | — | 326 g | 3.8 L | 2,717 mg | +4h34 |
| 650 | 4h43 | — | 283 g | 3.3 L | 2,358 mg | +5h17 |
| 700 | 4h21 | — | 261 g | 3 L | 2,175 mg | +5h39 |
| 750 | 4h08 | — | 248 g | 2.9 L | 2,067 mg | +5h52 |
| 800 | 3h59 | — | 239 g | 2.8 L | 1,992 mg | +6h01 |
Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.
Other trails worth preparing for in France
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- Chiang Mai Thailand - PAGODA 50-NIGHT57 km · 3,505 m D+ · November 28, 2026
- Chiang Mai Thailand - PAGODA 50-DAY57 km · 3,505 m D+ · November 28, 2026
- Chiang Mai Thailand - SUTHEP 20-NIGHT26 km · 1,131 m D+ · December 5, 2026
- Chiang Mai Thailand - SUTHEP 20-DAY26 km · 1,131 m D+ · December 6, 2026
- Amazean Jungle Thailand - JUNGLE 50K56 km · 2,812 m D+ · May 1, 2027
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- Mu Cang Chai Ultra Trail 55K56 km · 2,850 m D+ · October 3, 2026
- Chiang Mai Thailand - HMONG50 DAY56 km · 2,587 m D+ · December 6, 2025
Sources and method
- Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
- Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
- Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — Chiang Mai Thailand - INTHANON 50
Weather for Chiang Mai Thailand - INTHANON 50
The weather for Chiang Mai Thailand - INTHANON 50 will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.
Detailed weather for Chiang Mai Thailand - INTHANON 50, hour by hour on the courseFrequently asked questions
How many checkpoints?
Chiang Mai Thailand - INTHANON 50 has 5 checkpoints: 5 checkpoints with undocumented contents. Details are in the two tables above.
What distance and elevation gain?
Chiang Mai Thailand - INTHANON 50 is 39 km long with 2420 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 5h26 for Chiang Mai Thailand - INTHANON 50.
What's the weather forecast?
The weather for Chiang Mai Thailand - INTHANON 50 will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.
Want to stack the odds in your favor for Chiang Mai Thailand - INTHANON 50?
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