Craig-y-llyn

Craig-y-llyn is a mountain summit in the Cadair Idris range that rises to 622 meters with steep northern crags and gentle southern slopes. Multiple trails cross the mountain, including routes from Gwernen Lake Hotel and the Fox's Path, offering different access options for visitors.

Craig-y-llyn's formation dates back to ancient glacial periods that shaped the distinctive cwm and the small lake Llyn Cyri at its northern base. This geological history remains visible in the rock formations and landscape features visitors see today.

The Welsh name Craig-y-llyn means 'the lake's crag' and reflects the geographical bond between the mountain and the water body below. Visitors walking the different sides notice how the landscape tells this story through its varied slopes and the presence of water features.

The mountain is accessible through multiple hiking routes starting from different points such as Gwernen Lake Hotel or the Fox's Path, each offering different difficulty levels. Visitors should keep in mind that northern sections are steeper than southern slopes when choosing their route.

The mountain holds the designation of Site of Special Scientific Interest, underscoring its scientific importance and rich ecosystem. This recognition protects the many plant species that thrive at different elevations and on varied slopes.

Location: Gwynedd

Elevation above the sea: 622 m

Part of: Cadair Idris

GPS coordinates: 52.68911,-3.97599

Latest update: December 14, 2025 20:32