Eryri by UTMB® - Eryri 100K® 2027
This page is generated independently by RAVIT. RAVIT is not affiliated with UTMB Group SAS, the race's official organizer.
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.
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 - Eryri by UTMB® - Eryri 100K® · 2027
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 28.2 | Blaenau Ffestiniogkm 40.6 | Croesorkm 52.8 | Gwastadanas Farmkm 66.5 | Bron-y-Fedw Uchafkm 83.3 | Betws Garmonkm 91.6 | Llanberiskm 108.0 |
|---|---|---|---|---|---|---|---|---|
| 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 Eryri by UTMB® - Eryri 100K® · 2027
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
Eryri by UTMB® - Eryri 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 25h43 to 14h59. 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 | 25h43 | 11.5 | 1,543 g | 18 L | 12,858 mg | +6h47 |
| 550 | 23h26 | 9.4 | 1,406 g | 16.4 L | 11,717 mg | +9h04 |
| 600 | 21h07 | 7.1 | 1,267 g | 14.8 L | 10,558 mg | +11h23 |
| 650 | 19h59 | 6 | 1,199 g | 14 L | 9,992 mg | +12h31 |
| 700 | 17h34 | 3.6 | 1,054 g | 12.3 L | 8,783 mg | +14h56 |
| 750 | 16h00 | 2 | 960 g | 11.2 L | 8,000 mg | +16h30 |
| 800 | 14h59 | 1.5 | 899 g | 10.5 L | 7,492 mg | +17h31 |
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.
In the 2027 ranking
Eryri by UTMB® - Eryri 100K® is 108 km and 5,884 m of elevation gain, that's 166 km-effort: category XL, among 55 races in 2027. Its time limit of 32 h 30 requires a minimum speed of 3.3 km/h: rank 6 out of 49 of the widest cut-off times in XL.
XL ultra-trails 2027: 155 to 209 km-effort
Similar effort in 2027
- Grand Trail des Cadourques - GTC · 167 km-effort
- Eiger Ultra Trail - E101 - Ultra Trail · 164 km-effort
- Yeti Washington 100 Mile · 168 km-effort
Other trails worth preparing for
- North Coast 110170 km · 4,705 m D+ · November 7, 2026
- 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
- Skyline Scotland by UTMB® - Grand Tour of The Ben 100K®91 km · 2,811 m D+ · September 18, 2027
- Centurion A100158 km · 1,087 m D+ · October 17, 2026
Eryri by UTMB® - Eryri 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 — Eryri by UTMB® - Eryri 100K®
Weather for Eryri by UTMB® - Eryri 100K®
The weather for Eryri by UTMB® - Eryri 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 Eryri by UTMB® - Eryri 100K®, hour by hour on the courseFrequently asked questions
How many checkpoints?
Eryri by UTMB® - Eryri 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 Bron-y-Fedw Uchaf: 16.8 km and 1,099 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?
Eryri by UTMB® - Eryri 100K® is 108 km long with 5884 m of elevation gain.
How long to finish?
With a UTMB® Index of 600 (average runner), the estimated time is around 21h07 for Eryri by UTMB® - Eryri 100K®.
What's the weather forecast?
The weather for Eryri by UTMB® - Eryri 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 Eryri by UTMB® - Eryri 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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