Ultra-Trail Snowdonia - UTS 100K 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 8 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 - Ultra-Trail Snowdonia - UTS 100K · 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 | Gwastadannas Farmkm 14.1 | Dolwyddelankm 29.3 | Blaenau Ffestiniogkm 41.8 | Croesorkm 54.1 | Gwastadanas Farmkm 67.5 | Bedgelertkm 81.6 | Rhyd Ddukm 95.9 | Llanberiskm 107.2 |
|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available |
| Brand products · Näak | unavailable | available | available | unavailable | available | unavailable | available | unavailable |
| Hot meal | unavailable | unavailable | unavailable | available | unavailable | available | unavailable | available |
La feuille de ton assistance pour Ultra-Trail Snowdonia - UTS 100K · 2026
Ton assistance peut te voir à ces postes. Ton plan RAVIT y met tes heures, ce qu'elle te tend et la route pour y aller.
Recto, verso et planche d'étiquettes, en PDF : l'exemple d'une coureuse de l'UTMB.
Elevation profile
The course and its aid stations
Ultra-Trail Snowdonia - UTS 100K: 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 22h12 to 13h06, and the aid-station stop budget from 1h12 to 0h22. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 22h12 | 1h12 | 8.2 | 1,332 g | 15.5 L | 11,102 mg | +10h18 |
| 550 | 20h22 | 0h58 | 6.4 | 1,222 g | 14.3 L | 10,185 mg | +12h08 |
| 600 | 18h38 | 0h47 | 4.6 | 1,118 g | 13 L | 9,315 mg | +13h52 |
| 650 | 16h56 | 0h39 | 2.9 | 1,016 g | 11.9 L | 8,469 mg | +15h34 |
| 700 | 15h22 | 0h32 | 1.5 | 922 g | 10.8 L | 7,687 mg | +17h08 |
| 750 | 14h05 | 0h26 | 1.5 | 845 g | 9.9 L | 7,043 mg | +18h25 |
| 800 | 13h06 | 0h22 | 1.5 | 786 g | 9.2 L | 6,548 mg | +19h24 |
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
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- Slate Trail Ultra147 km · 3,666 m D+ · November 14, 2026
- Winter 5588 km · 2,006 m D+ · December 5, 2026
- Arc of Attrition - Arc 100K83 km · 2,588 m D+ · January 23, 2027
- South Downs Way 50M79 km · 1,754 m D+ · April 10, 2027
- Eryri by UTMB® - Eryri 100M®164 km · 9,356 m D+ · May 14, 2027
- Eryri by UTMB® - Eryri 80K®79 km · 2,547 m D+ · May 14, 2027
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Ultra-Trail Snowdonia - UTS 100K 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 — Ultra-Trail Snowdonia - UTS 100K
Weather for Ultra-Trail Snowdonia - UTS 100K
The weather for Ultra-Trail Snowdonia - UTS 100K 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 Ultra-Trail Snowdonia - UTS 100K, hour by hour on the courseFrequently asked questions
How many checkpoints?
Ultra-Trail Snowdonia - UTS 100K has 8 checkpoints: 7 aid stations and 1 water point. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Dolwyddelan: 15.2 km and 0 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?
Ultra-Trail Snowdonia - UTS 100K is 107 km long with 5536 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 18h38 for Ultra-Trail Snowdonia - UTS 100K.
What's the weather forecast?
The weather for Ultra-Trail Snowdonia - UTS 100K 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 Ultra-Trail Snowdonia - UTS 100K?
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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