Skamper
14.4km

Yr Wyddfa (Snowdon) — 14.4 km Running Out-and-back

by Skamper

Yr Wyddfa (Snowdon) is a 14.4 km (9.0 miles) out-and-back in Llanberis, Eryri (Snowdonia), Wales: hilly, with 962 m of climb, on mostly trail ground.

Eryri (Snowdonia) National Park
962 mAscent
Paved15%Paved
5/5Hilly
Yr Wyddfa (Snowdon) running route
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Photos

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Elevation

Explore the Yr Wyddfa (Snowdon)

Location: Llanberis, Eryri (Snowdonia), Wales

Lace up for a challenging out-and-back adventure to the summit of Yr Wyddfa, Wales' highest peak, starting from Llanberis. This largely paved, demanding route parallels the iconic mountain railway, guiding you through stunning Eryri (Snowdonia) landscapes with every metre of its significant 962m ascent. Be mindful of the changeable mountain weather and prepare for exposed conditions as you climb above 500m.

Ideal for experienced runners seeking a rigorous mountain challenge or those preparing for demanding trail events, this route offers breathtaking vistas and a real sense of accomplishment. While the course is well-defined, the steep gradients and high altitude require careful pacing and appropriate gear, promising an unforgettable journey to the roof of Wales.

Common questions

How long is this route?
It's a 14.4 km out-and-back in Llanberis, Eryri (Snowdonia), Wales with around 962 metres of total ascent.
How long will it take me to run it?
Use the 'Your time estimate' panel at the top of this page — it predicts your finish time for this exact route from your age, sex and most recent benchmark, accounting for distance, ascent and surface.
Is it hilly?
Yes — seriously. It rates 5 out of 5 on our hill scale — long, steep climbing throughout. About 67 metres of climb per kilometre, 962 metres in total.
What's the surface like?
It's mostly off-road (around 85% trail). Trail shoes are recommended.

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