Trail running routes in Eryri (Snowdonia) · 4
Wild Welsh mountains with some of the most technical terrain on these islands.
4
Routes
18.2km
Avg distance
5,019m
Total ascent
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4 routes
VERY HARD
Cadair Idris, Mynydd Moel and Craig Lwyd Circular
You get the full horseshoe around one of Snowdonia's most dramatic cwms rather than a straight there-and-back to the summit, so the mountain's best feature - the cliff-ringed bowl at its heart - is in view for most of the route.
No car neededDog friendly
EXPERT
Snowdon, Grib Goch, Glyder Fawr, Y Garn & Elidir Fawr from Llanberis Trail Running Route
Crib Goch is one of the most exposed ridges in Britain, and this route puts it in the middle of a big mountain day rather than as the whole objective, so you get the scramble and a proper crossing into the Glyderau either side of it.
Fell runNo car needed
Checked Jul 2026
VERY HARD
Yr Wyddfa via Llanberis Path
It's the most runnable line to the summit of Yr Wyddfa, following the rack railway most of the way up, so you can move fast on genuinely good underfoot conditions rather than picking through rock.
No car neededDog friendly
EXPERT
Yr Wyddfa via Miners' Track, Pyg Track and Crib Goch
Most people treat the Miners' and Pyg Tracks as a straightforward there-and-back pairing, but this GPX shows the loop actually crossing Crib Goch, which changes the entire character of the day.
Fell runNo car needed
About running in Eryri (Snowdonia)
Wild Welsh mountains with some of the most technical terrain on these islands.
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