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Mountain biking trails

Pen-y-Pass – Telegraph Valley (Maesgwm) loop from Penrhyndeudraeth

Routes

Mountain biking trails

Pen-y-Pass – Telegraph Valley (Maesgwm) loop from Penrhyndeudraeth

Hard

riders

Pen-y-Pass – Telegraph Valley (Maesgwm) loop from Penrhyndeudraeth

04:51

62.8km

1,210m

Mountain biking

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: May 27, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Train Station

Get Directions

9.59 km

Coed Caeddafydd

Forest

14.6 km

Coed yr Odyn

Forest

24.0 km

Pen-y-Pass

Highlight • Parking

Right in the heart of northern Eryri (Snowdonia), Pen-y-Pass is superbly located for adventures on the Yr Wyddfa (Snowdon) massif and the Glyderau. It is a popular starting point for …

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24.1 km

Mallory's Café

Highlight • Cafe

Iconic Pen y Pass is the access point to both the Miners’ and Pyg Track trailheads leading to Yr Wyddfa’s summit. At the pass are toilets, a café, and a …

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26.3 km

Cromlech Boulders

Highlight • Climb

Right opposite the layby are the two main blocks - a good description and link to the topo is at climber.co.uk/outdoor/bouldering/around-the-bloc-the-cromlech-boulders-llanberis

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31.4 km

View of Llyn Peris and Dinorwig Quarry

Highlight • Viewpoint

Excellent sight looking across Llyn Peris which is 503mtrs above sea level. Dinorwig hydroelectric power station is straight across the lake, this generates 1728MW of power. There are 16 kilometres …

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35.6 km

Telegraph Valley (Maesgwm)

Highlight (Segment) • Trail

Maesgwm is also known as Telegraph Valley. The trail is gravel and well-made, brilliant to ride and much quieter than the main Llanberis path. It makes a great loop from …

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42.9 km

Rhyd Ddu railway crossing

Highlight • Structure

Stop, look out and listen are the recommendations (to be read on the sign) that you must follow when crossing the track here. It is an unguarded crossing on this railway for tourist trains.

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