SMT25 2026
The forecast arrives five days before the start.
Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 3 aid stations to plan your nutrition and hydration segment by segment.
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.
Cut-off times and crew - SMT25 · 2026
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
| Product | CP1 The Greenkm 7.6 | A1 Ban Dechkm 10.4 | WS4 Mae Nam Soi 7km 14.9 |
|---|---|---|---|
| Water | available | available | available |
| Brand products | available | available | available |
Elevation profile
The course and its aid stations
SMT25: 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 3h49 to 2h30, and the aid-station stop budget from 0h05 to 0h02. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium |
|---|---|---|---|---|---|---|
| 500 | 3h49 | 0h05 | 3 | 229 g | 2.7 L | 1,908 mg |
| 550 | 3h24 | 0h04 | 3 | 204 g | 2.4 L | 1,704 mg |
| 600 | 3h10 | 0h03 | 3 | 190 g | 2.2 L | 1,579 mg |
| 650 | 2h58 | 0h03 | 3 | 178 g | 2.1 L | 1,482 mg |
| 700 | 2h48 | 0h02 | 2.8 | 168 g | 2 L | 1,399 mg |
| 750 | 2h40 | 0h02 | 2.7 | 160 g | 1.9 L | 1,332 mg |
| 800 | 2h30 | 0h02 | 2.5 | 150 g | 1.8 L | 1,252 mg |
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
- SMT1515 km · 1,094 m D+ · November 8, 2026
- Chiang Mai Thailand - INTHANON 2020 km · 844 m D+ · November 29, 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
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 — SMT25
Weather for SMT25
The weather for SMT25 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 SMT25, hour by hour on the courseFrequently asked questions
How many checkpoints?
SMT25 has 4 checkpoints: 3 aid stations and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to CP1 The Green: 7.6 km and 780 m elevation gain. That's the one to load up for first.
How do I find the exact location of an aid station?
The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.
What distance and elevation gain?
SMT25 is 22 km long with 1656 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 3h10 for SMT25.
What's the weather forecast?
The weather for SMT25 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 SMT25?
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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