Rhinog Fawr

Rhinog Fawr is a 2,360ft (720m) mountain with exceptionally rough and rugged terrain in Snowdonia National Park.

It’s most commonly accessed via Llyn Cwm Bychan on an ancient Roman path up into the hills.

Rhinog Fawr & Fach Trail Route

Rhinog Fawr & Fach are two mountains in southern Snowdonia National Park that offer a challenge and a truly remote isolated experience. We love this 9 mile circular trail route that starts and ends at the campsite by the beautiful lake Llyn Cwm Bychan. An old Roman road leads into the mountains, providing the perfect opening scene for some spectacular scenery.

Distance 9 miles

Time 5 hours (walking) 2.5 hours (running)

Total Ascent 3,964ft

OS Maps click to open this route on the OS Maps website

Summits Rhinog Fawr (720m) Rhinog Fach (712 m)

Rhinog Fawr & Fach Trail Route 3D Map

1. Starting at the Cwm Bychan campsite, postcode LL45 2PH, a clear footpath leads over a stream and into a short section of divine woodland. This soon opens out in the valley and takes an ancient Roman road towards Rhinog Fawr.

2. Just after the path tops out and starts to descend the footpath takes a right hand turn through boulders and ferns, wrapping around the crags and ascending to the lake Llyn Du. This is a wonderful place for a coffee break. From here we take the south side of the lake and then ascend to the left through a rough boulder path to the summit of Rhinog Fawr.

3. The descent of Rhinog Fawr to the south is the toughest section of this trail route to navigate. The path is sketchy at best but we generally keep heading downhill until we reach the valley floor, covering approx 1,300ft of descent in about half a mile. From here we continue south, along the west face of Rhinog Fach.

4. The toughest ascent begins here, climbing approx 1,200ft in another half mile. From Rhinog Fach summit we head north, descending sharply to meet the main footpath that leads to Graigddu forest.

5. The forest footpath is magical, especially towards golden hour and sunset. On reaching the Pistyll Gwyn waterfall the path heads directly west, joining the old Roman road back to Cwm Bychan.

Rhinog Fawr Photo Gallery

Some of our favourite memories from trips to Rhinog Fawr mountain.