Eryri by UTMB® - Eryri 50K® 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 4 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 50K® · 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 | Gwastadanas Farmkm 15.3 | Bron y Fedw Uchafkm 32.9 | Betws Garmonkm 41.0 | Llanberiskm 57.6 |
|---|---|---|---|---|
| Water | available | available | available | available |
| Brand products · Näak | available | available | available | unavailable |
| Hot meal | unavailable | unavailable | unavailable | available |
La feuille de ton assistance pour Eryri by UTMB® - Eryri 50K® · 2027
L'assistance n'est autorisée sur aucun poste de cette course.
Elevation profile
The course and its aid stations
Eryri by UTMB® - Eryri 50K®: 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 10h19 to 6h24, and the aid-station stop budget from 0h14 to 0h06. 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 | 10h19 | 0h14 | — | 619 g | 7.2 L | 5,158 mg | +3h41 |
| 550 | 9h30 | 0h13 | — | 570 g | 6.7 L | 4,750 mg | +4h30 |
| 600 | 8h50 | 0h12 | — | 530 g | 6.2 L | 4,417 mg | +5h10 |
| 650 | 8h11 | 0h10 | — | 491 g | 5.7 L | 4,092 mg | +5h49 |
| 700 | 7h24 | 0h08 | — | 444 g | 5.2 L | 3,700 mg | +6h36 |
| 750 | 6h50 | 0h06 | — | 410 g | 4.8 L | 3,417 mg | +7h10 |
| 800 | 6h24 | 0h06 | — | 384 g | 4.5 L | 3,200 mg | +7h36 |
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 50K® is 58 km and 3,407 m of elevation gain, that's 91 km-effort: category M, among 124 races in 2027. Its time limit of 14 h requires a minimum speed of 4.1 km/h: rank 45 out of 112 of the widest cut-off times in M.
M trails 2027: 75 to 114 km-effort
Similar effort in 2027
- Istria 100 - 69K · 91 km-effort
- UTFS 66KM · 91 km-effort
- Heaven’s Gate 53k · 92 km-effort
Other trails worth preparing for
- Winter 5588 km · 2,006 m D+ · December 5, 2026
- Arc of Attrition - Arc 100K83 km · 2,588 m D+ · January 23, 2027
- Arc of Attrition - Arc 50K49 km · 1,329 m D+ · January 24, 2027
- South Downs Way 50M79 km · 1,754 m D+ · April 10, 2027
- Granite Peaks Ultra 50k52 km · 3,896 m D+ · April 17, 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
- Skyline Scotland by UTMB® - Tour of the Ben 50K®63 km · 1,953 m D+ · September 18, 2027
- Beachy Head Ultra50 km · 1,293 m D+ · October 24, 2026
Eryri by UTMB® - Eryri 50K® 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 50K®
Weather for Eryri by UTMB® - Eryri 50K®
The weather for Eryri by UTMB® - Eryri 50K® 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 50K®, hour by hour on the courseFrequently asked questions
How many checkpoints?
Eryri by UTMB® - Eryri 50K® has 4 checkpoints: 4 aid stations. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Bron y Fedw Uchaf: 17.6 km and 1,131 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 50K® is 58 km long with 3407 m of elevation gain.
How long to finish?
With a UTMB® Index of 600 (average runner), the estimated time is around 8h50 for Eryri by UTMB® - Eryri 50K®.
What's the weather forecast?
The weather for Eryri by UTMB® - Eryri 50K® 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 50K®?
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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