163 kmTrail🇬🇧 Llanberis, United Kingdom

Eryri by UTMB 100M

Friday, 14 May 2027In 7 months · Start 14:00

A huge loop of the mountains of Snowdonia (Eryri) from Llanberis, with rocky ridges, open moorland and over 9,000 m of climbing.

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Facts checked 10 Oct 2026 against eryri.utmb.world, in.register-utmb.world.

Elevation gain

9,200 m

Mountain · ↓ 9,200 m

Start altitude

105 m

above sea level, from terrain data

Temp at start

15°C

Peaks around 15°C

Entry fee

≈ $410

Open entry

Finishers

—

typical year

Course

Loop

48h cut-off

Getting thereFly into LPL (Liverpool), about 88 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Mountain: about 9,200 m of climbing and 9,200 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

15°C

Peak during race

15°C

Humidity

69%

Chance of rain

39%

Wind

14 km/h

Race day in past years

Historical averages for 14 May ±3 days, 2016–2025, from 14:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/eryri-100m" title="Eryri by UTMB 100M on iRun42"><img src="https://irun42.com/badge/eryri-100m.svg" width="300" height="120" alt="Eryri by UTMB 100M: course, elevation and race-day weather on iRun42" /></a>