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Cadair Idris

Cadair Idris · Southern Snowdonia

Cadair Idris — "the Chair of Idris" — rises dramatically above Dolgellau and the Mawddach estuary. Legend holds that anyone who sleeps on its summit wakes either a poet or a madman. The horseshoe ridge around the deep glacial cwm of Llyn Cau is one of the most complete and visually striking in Wales, combining accessible paths with a genuinely mountainous atmosphere.

Interactive terrain · tap a marker for peak info

Difficulty

Moderate – Hard

Terrain

Glacial cwm, rocky ridge, steep scree paths

Best for

Mythology & legend · A complete horseshoe in a day · Dramatic lake views

Key peaks

Penygadair

893m

The highest point of Cadair Idris, with a small summit shelter and sweeping coastal views.

Moderate

Cyfrwy

821m

A dramatic, narrow-topped summit on the western arm of the horseshoe, named "the saddle".

Hard, narrow ridge

Mynydd Moel

863m

The eastern horn of the horseshoe, with steep drops into Cwm Cau.

Moderate – Hard

Gau Graig

683m

A lower spur extending the ridge east from Mynydd Moel.

Moderate

Craig Cwm Amarch

791m

A rocky top on the southern rim above Llyn Cau, with vertiginous views down to the lake.

Moderate – Hard

Tyrrau Mawr

652m

The westernmost summit of the wider Cadair Idris range, overlooking the Mawddach estuary.

Easy – Moderate

Mynydd Pencoed

740m

A connecting summit between Tyrrau Mawr and the main Cadair ridge.

Moderate

Suggested routes

The Cadair Idris Horseshoe

Minffordd Path up via Craig Cwm Amarch, over Penygadair and Mynydd Moel, back down past Llyn Cau.

11 km·5–6 hrs

Pony Path

The most direct and popular route to the summit from Ty Nant.

10 km·4–5 hrs

Tyrrau Mawr Extension

A longer traverse continuing west from the main horseshoe to Tyrrau Mawr.

16 km·7 hrs

Mountain weather

Safety & weather

  • The Minffordd Path’s initial ascent past Llyn Cau is steep and exposed in wet weather.
  • Cyfrwy’s ridge has short scrambling sections that are best avoided in high wind.
  • Cloud forms quickly over the cwm, obscuring the steep drops near the rim.

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