Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Llanberis

Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Llanberis

Hard

5.0

(3)

riders

Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Llanberis

03:47

50.6km

1,070m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: October 15, 2026

Tips

Includes a segment that goes up or down a series of steps

You may need to carry your bike.

After 40.4 km for 15 m

Waypoints

Start point

Bus stop

Get Directions

1.22 km

Pete's Eats Cafe

Highlight • Cafe

Nothing short of an institution, Pete's Eats is the only place to be when rain cancels play Llanberis. Of all the food and drink available on the impressively extensive menu, …

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2.38 km

Ruins

3.43 km

Llanberis Tunnel

Highlight • Structure

Great bike path with a small section through the hill for a change!

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6.30 km

View of Snowdon

Highlight • Climb

Hidden up a short, sharp climb you come out to the most amazing view of the mountains of Snowdonia.

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29.5 km

Dorothea Slate Quarry and Ruins

Highlight (Segment) • Historical Site

Well worth a visit and I'd strongly recommend riding around the entire quarry taking time to check out the huge gantry pyramids and pumping station.

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33.6 km

View of Snowdon (Yr Wyddfa) Across Llyn Nantlle Uchaf

Highlight • Viewpoint

Nantle Valley is well known for its mountains and ridge. A lot of historic settlements and slate mining. Stunning views of Snowdonia. Road surface is good watch out for sheep …

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37.7 km

Drws y Coed Climb

Highlight (Segment) • Climb

A 4.3km climb in Dyffryn Nantlle with a deceptive average gradient of 3.3% with the final section closer to the maximum gradient of 12.4%.

A 4.3km climb in Dyffryn Nantlle …

Translated by Google •

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41.1 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.

Showing Translation

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46.1 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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