Chiang Mai Thailand - INTHANON 20 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 20 · 2025
| Aid station | Cum. km | Cum. D+ | Seg. km | Seg. D+ | Seg. D- | Crew | Cut-off | Access |
|---|---|---|---|---|---|---|---|---|
| B1 Pha Mon Mai Village | 9.9 | 0 m | 9.9 | 518 m | 583 m | — | — | — |
| B2 Mae Klang Luang Village | 15.8 | 0 m | 6.0 | 152 m | 266 m | — | Sun 01:30 PM | — |
| Doi Inthanon National Park HQ | 20.4 | 0 m | 4.6 | 325 m | 146 m | — | Sun 03:00 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 20: 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 2h36 to 1h36. 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 | 2h36 | — | 156 g | 1.8 L | 1,300 mg | +4h24 |
| 550 | 2h21 | — | 141 g | 1.6 L | 1,175 mg | +4h39 |
| 600 | 2h16 | — | 136 g | 1.6 L | 1,133 mg | +4h44 |
| 650 | 2h03 | — | 123 g | 1.4 L | 1,025 mg | +4h57 |
| 700 | 1h53 | — | 113 g | 1.3 L | 942 mg | +5h07 |
| 750 | 1h44 | — | 104 g | 1.2 L | 867 mg | +5h16 |
| 800 | 1h36 | — | 96 g | 1.1 L | 800 mg | +5h24 |
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
- SMT1515 km · 1,094 m D+ · November 8, 2026
- SMT2522 km · 1,656 m D+ · November 8, 2026
- Chiang Mai Thailand - SUTHEP 20-NIGHT26 km · 1,131 m D+ · December 5, 2026
- Chiang Mai Thailand - CHEDI 2017 km · 687 m D+ · December 6, 2026
- Chiang Mai Thailand - SUTHEP 20-DAY26 km · 1,131 m D+ · December 6, 2026
- Amazean Jungle Thailand - MIST 20K26 km · 1,074 m D+ · May 2, 2027
- Amazean Jungle Thailand - FLOWER 20K17 km · 544 m D+ · May 2, 2027
- PHUKET TRAIL PKT1515 km · 660 m D+ · September 13, 2026
Chiang Mai Thailand - INTHANON 20 over the years
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 20
Weather for Chiang Mai Thailand - INTHANON 20
The weather for Chiang Mai Thailand - INTHANON 20 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 20, hour by hour on the courseFrequently asked questions
How many checkpoints?
Chiang Mai Thailand - INTHANON 20 has 3 checkpoints: 3 checkpoints with undocumented contents. Details are in the two tables above.
What distance and elevation gain?
Chiang Mai Thailand - INTHANON 20 is 20 km long with 995 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 2h16 for Chiang Mai Thailand - INTHANON 20.
What's the weather forecast?
The weather for Chiang Mai Thailand - INTHANON 20 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 20?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
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