Rhinogydd

The Rhinogydd are unlike any other mountains in Wales. Built from Cambrian gritstone laid down some 500 to 600 million years ago — among the oldest exposed rock in Britain — they present a landscape of grinding effort and absolute solitude. There are no easy paths, no manicured trails, no mountain cafes. What there is, instead, is one of the most genuinely wild landscapes in England and Wales.

The Mountain

The Rhinogydd span roughly 20 kilometres from north to south between the village of Trawsfynydd and the coast at Barmouth. The rock is Cambrian gritstone — hard, unforgiving, and ancient beyond easy comprehension. Six hundred million years ago, this material was being deposited as marine sediment before even the first complex animals had appeared on Earth. It has been folded, uplifted, eroded, and sculpted by ice, leaving a landscape of rough ridges, deep heather, and interminable tussock grass.

The highest summit is Y Llethr (756m) at the southern end of the range. Rhinog Fawr (720m) and Rhinog Fach (712m) are the central peaks and the most frequently visited — the Roman Steps approach to Rhinog Fawr via Bwlch Tyddiad is one of the most atmospheric mountain walks in Wales. The Steps are not Roman but medieval, a packhorse route used to carry goods across the mountains from the Ardudwy coast to the Trawsfynydd plateau.

Routes to the Summit

Roman Steps to Rhinog Fawr: From the car park above Llyn Cwm Bychan, the Roman Steps follow a beautifully preserved medieval path through a boulder-strewn defile to Bwlch Tyddiad (the pass). From the pass, steep pathless slopes lead to the summit of Rhinog Fawr. The Steps themselves are the highlight — a unique piece of landscape history threading through one of the most dramatic valleys in the range.

Cwm Nantcol to Rhinog Fach: The approach from Cwm Nantcol involves a sustained battle with heather and tussock but gives direct access to Rhinog Fach and the ridge south to Y Llethr. This is the loneliest approach in the range and should only be attempted by confident navigators with map and compass.

Y Llethr from Llyn Bodlyn: A shorter route to the highest summit from the south, starting near the lake above Dyffryn Ardudwy. The going is strenuous but the views from the top extend from the Lleyn Peninsula to Cadair Idris.

Practical Notes

The Rhinogydd demand more effort per metre of height gained than almost any other mountains in Wales. The combination of trackless heather, tussock grass, and deeply gullied terrain makes progress slow — one kilometre on the map can take 45 minutes on the ground. Navigation skill is genuinely required: compass and 1:25,000 map, not just a phone. Mobile signal is poor throughout the range. Tell someone where you are going, take more food and water than you think you need, and allow generous time. The reward is a quality of solitude increasingly rare in the mountains of Wales.