NCN 8 - Lôn Las Cymru

409.4 km 4266 m climbing About 4 days 11% off road Road cycling North Wales & Snowdonia

The route runs from Holyhead south through Anglesey and Snowdonia before turning inland across mid-Wales and down to Cardiff, and the terrain shifts noticeably as it goes.

The northern sections through Snowdonia are rolling and at times sharply so, while the middle stretch around Dylife and Llangurig is the hardest of the lot. South of Llanfaes the gradient eases and the final fifth into Cardiff is gently rolling. About nine-tenths of the route is on road.

The figures

Distance	409.4 km
Climbing	4266 m
Off road	47 km, about 11% of the route
Riding time	about 24 hours, roughly 4 days at a moderate pace
Region	North Wales & Snowdonia
Route from	Sustrans

Worth knowing before you go

The stretch between Dolgellau and Llangurig is long and the settlements are sparse, so resupply needs planning before you leave Dolgellau or Pantperthog. Dylife sits in the middle of that gap with nothing much around it. The route passes through Treharris and the valleys south of there before threading through the northern Cardiff suburbs to finish at Cardiff Bay.

Put your own dates on this and TourTrax splits it into days at your pace, finds somewhere to sleep at the end of each one, estimates what it will cost and gets you to the start without flying.

Plan this route → Download the GPX

Other route guides

NCN 8 - Lôn Las Cymru is an official route from Sustrans (their website).