Ultra-Trail Snowdonia - UTS 100M 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 13 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 100M · 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 | Pen-y-Passkm 12.0 | Ogwen Valleykm 21.9 | Llyn Eigiaukm 37.2 | Capel Curigkm 49.5 | Dolwyddelankm 59.8 | Blaenau Ffestiniogkm 72.3 | Croesorkm 84.6 | Gwastadanas Farmkm 98.2 | Beddgelertkm 112.3 | Rhyd-Ddukm 126.7 | Bron-y-Fedw Uchafkm 139.2 | Betws Garmonkm 147.5 | Llanberiskm 163.9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water | available | available | available | available | available | available | available | available | available | available | available | available | available |
| Brand products · Näak | unavailable | available | available | unavailable | available | available | unavailable | available | unavailable | available | available | available | unavailable |
| Hot meal | unavailable | unavailable | unavailable | available | unavailable | unavailable | available | unavailable | available | unavailable | unavailable | unavailable | available |
La feuille de ton assistance pour Ultra-Trail Snowdonia - UTS 100M · 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 100M: 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 41h08 to 24h53, and the aid-station stop budget from 6h39 to 1h21. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
Below a UTMB® Index of roughly 395, the overall cut-off of 48h00 is no longer reachable at the estimated pace.
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 41h08 | 6h39 | 20 | 2,468 g | 28.8 L | 20,567 mg | +6h52 |
| 550 | 38h21 | 5h37 | 17.4 | 2,301 g | 26.8 L | 19,174 mg | +9h39 |
| 600 | 35h30 | 4h38 | 14.5 | 2,130 g | 24.9 L | 17,752 mg | +12h30 |
| 650 | 32h33 | 3h35 | 11.6 | 1,953 g | 22.8 L | 16,279 mg | +15h27 |
| 700 | 29h34 | 2h32 | 10 | 1,774 g | 20.7 L | 14,785 mg | +18h26 |
| 750 | 27h04 | 1h49 | 10 | 1,624 g | 19 L | 13,537 mg | +20h56 |
| 800 | 24h53 | 1h21 | 10 | 1,493 g | 17.4 L | 12,438 mg | +23h07 |
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.
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Ultra-Trail Snowdonia - UTS 100M 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 100M
Weather for Ultra-Trail Snowdonia - UTS 100M
The weather for Ultra-Trail Snowdonia - UTS 100M 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 100M, hour by hour on the courseFrequently asked questions
How many checkpoints?
Ultra-Trail Snowdonia - UTS 100M has 13 checkpoints: 12 aid stations and 1 water point. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Llanberis: 16.4 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 100M is 164 km long with 9027 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 35h30 for Ultra-Trail Snowdonia - UTS 100M.
What's the weather forecast?
The weather for Ultra-Trail Snowdonia - UTS 100M 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 100M?
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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