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Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Cwm-y-glo

Routes

Bike touring routes & trails

Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Cwm-y-glo

Hard

1.0

(1)

riders

Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Cwm-y-glo

02:31

29.0km

680m

Cycling

Hard bike 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: May 14, 2026

Tips

Cycling is not permitted along parts of this route

After 22.5 km for 109 m

After 25.7 km for 307 m

Waypoints

Start point

Bus stop

Get Directions

926 m

View of Llyn Padarn from Pont Pen-y-Llyn

Highlight • Viewpoint

On a clear day, from this end of Llyn Padarn you’ll get an enticing view of Snowdon and other peaks.
Its absolutely stunning and well worth the ride.

Tip by

1.82 km

Llanberis Tunnel

Highlight • Structure

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

Tip by

3.10 km

Llyn Padarn

Lake

7.23 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 …

Tip by

10.3 km

View of Llyn Cwellyn

Highlight • Lake

What can I say... Fantastic!

Tip by

10.5 km

View of Mynydd Mawr and Llyn Cwellyn

Highlight • Summit

11.8 km

Snowdon Ranger Hostel

Highlight • Mountain Hut

Hiking hostel at the foot of the mountain named after the 'the Snowdon Ranger' who lived there.

Tip by

11.9 km

Cat Crossing

Highlight • Viewpoint

14.0 km

Coed Plas-y-nant

Forest

14.7 km

Coed Tanygarreg

Forest

19.2 km

The Mirror

Highlight • Lake

29.0 km

End point

Bus stop

Way Types & Surfaces

Way Types

6.66 km

5.51 km

5.21 km

4.17 km

4.07 km

3.39 km

Surfaces

14.1 km

8.43 km

6.20 km

230 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (460 m)

Lowest point (100 m)

Weather

Thursday 28 May

18°C

11°C

0 %

Additional weather tips

Max wind speed: 23.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Llanberis Tunnel – Telegraph Valley (Maesgwm) loop from Cwm-y-glo

View of Llyn Padarn from Pont Pen-y-Llyn

Llanberis Tunnel

Telegraph Valley (Maesgwm)

View of Llyn Cwellyn

View of Mynydd Mawr and Llyn Cwellyn

Snowdon Ranger Hostel

Cat Crossing

The Mirror

Nearby routes

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