Skamper
9.9km

The Moelwyns — 9.9 km Running Route

by Skamper

The Moelwyns is a 9.9 km (6.2 miles) loop in Tan-y-grisiau, Eryri (Snowdonia), Wales: hilly, with 618 m of climb, on mostly trail ground.

618 mAscent
Paved25%Paved
5/5Hilly
The Moelwyns running route
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Photos

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Elevation

Explore the The Moelwyns

Location: Tan-y-grisiau, Eryri (Snowdonia), Wales

Lace up for a challenging escapade into the heart of the Moelwyns, starting near Tan-y-grisiau in Eryri (Snowdonia). This 9.9km loop is a true test, boasting a significant 618-meter ascent as you navigate the rugged terrain. Expect varied surfaces – largely unpaved trails, including the Cambrian Way and Eryri (Snowdonia) Slate Trail – leading you past the serene Llyn Stwlan, then onward and upward to conquer both Moelwyn Bach and Moelwyn Mawr before descending past Llyn Cwmorthin.

This route is ideal for experienced runners seeking a demanding mountain training session or those looking to immerse themselves in Eryri (Snowdonia)'s wild beauty. Be prepared for rapidly changing weather conditions, as sections rise above 500m, offering breathtaking panoramic views for those who earn them.

Common questions

How long is this route?
It's a 9.9 km loop in Tan-y-grisiau, Eryri (Snowdonia), Wales with around 618 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 62 metres of climb per kilometre, 618 metres in total.
What's the surface like?
It's mostly off-road (around 75% trail). Trail shoes are recommended.

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