Snowdon Horseshoe

Knife-edge ridges, high summits, and a journey across the highest mountains of Eryri.

The Snowdon Horseshoe is a classic mountain circuit beginning and ending at Pen-y-Pass in Eryri (Snowdonia) National Park. Following a continuous line around the head of the Llanberis Pass, the route links Crib Goch, Garnedd Ugain, Yr Wyddfa (Snowdon), and Y Lliwedd through one of the most challenging and celebrated mountain days in Wales.

As a self-guided journey, the route connects some of Eryri's most dramatic ridges and summits while passing above Llyn Llydaw and Glaslyn. The circuit is defined by exposure, elevation, and sustained mountain terrain, with narrow ridges, scrambling sections, and panoramic views creating an experience that differs significantly from the more straightforward paths to Yr Wyddfa's summit.

The character of the route changes throughout the day. The exposed crest of Crib Goch demands careful movement and concentration, while the higher summits of Garnedd Ugain and Yr Wyddfa provide expansive views across North Wales, the coast, and the Irish Sea. The return over Y Lliwedd offers a quieter and more reflective section, completing the circuit above the lakes before descending back to Pen-y-Pass.

Despite its relatively short distance, the Snowdon Horseshoe is regarded as a serious mountain route. Exposure, scrambling, loose rock, and rapidly changing weather conditions require experience, confidence, and good mountain judgement. For many walkers, the appeal lies in its intensity, combining some of the finest ridge walking in Britain with the dramatic scenery of Eryri.

Overview

Distance 7 miles / 11 km

Duration 6–8 hours

Difficulty Challenging

Start Pen-y-Pass, Gwynedd

Finish Pen-y-Pass, Gwynedd

Terrain Rocky paths, steep ascents, exposed ridges, and scrambling sections