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Mountain hikes & routes

Pen-y-Pass – Llyn Llydaw loop from Cwm Dyli Power Station

Mountain hikes & routes

Pen-y-Pass – Llyn Llydaw loop from Cwm Dyli Power Station

Hard

10

hikers

Pen-y-Pass – Llyn Llydaw loop from Cwm Dyli Power Station

05:15

14.5km

660m

Mountaineering

Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: October 7, 2026

Tips

Includes segments that may be dangerous

Parts of this route comprise highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.

After 6.12 km for 808 m

After 7.51 km for 417 m

After 8.00 km for 162 m

Waypoints

A

Start point

Parking

1

1.63 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 …

Tip by

3.48 km

Viewpoint

Viewpoint

3

3.93 km

Llyn Llydaw

Highlight • Viewpoint

Quite idyllic view and if you are on the horseshoe route you can trace back almost the complete set of ridges from here (and see other people scrambling up there).

Tip by

4

5.06 km

Llyn Llydaw

Highlight • Lake

Llyn Llydaw is a beautiful natural lake nestled amid dramatic mountain peaks. The beach at the far end is the perfect place to cool off before the final descent to Pen-y-Pass.

Tip by

5

7.09 km

View Along the Watkin Path, Snowdon

Highlight • Trail

Beautiful views everywhere (mountains, lakes, trails, nature, ...)

Translated by Google •

Tip by

6

7.90 km

View of Y Lliwedd

Highlight • Viewpoint

Beautiful route through the rocks with views of the rugged side of Y Lliwedd

Translated by Google •

Tip by

7

8.11 km

Y Lliwedd

Highlight • Viewpoint

If it were almost anywhere else, twin-peaked Y Lliwedd would be far more celebrated than it is. Forming the bulk of Snowdon’s curved south-eastern ridge, it deserves to be treated …

Tip by

8.78 km

Yr Wyddfa National Nature Reserve

Nature Reserve

9

10.3 km

Ruins Near Y Lliwedd

Highlight • Historical Site

Here you climb to Y Lliwedd. A beautiful, uncrowded route.

Translated by Google •

Tip by

10

11.3 km

Algae Patterns in Llyn Glaslyn

Highlight • Lake

An interesting viewpoint, I wish I knew more about it, still one among the many intesting things to see

Tip by

B

14.5 km

End point

Parking

Way Types & Surfaces

Way Types

10.2 km

2.15 km

1.43 km

525 m

179 m

Surfaces

5.05 km

3.90 km

2.50 km

1.43 km

1.02 km

583 m

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Elevation

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

Highest point (850 m)

Lowest point (260 m)

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Weather

Powered by Foreca

Thursday 8 October

15°C

9°C

94 %

Additional weather tips

Max wind speed: 46.0 km/h

to get more detailed weather forecasts along your route

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