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Bwlch y Groes – Lake Vyrnwy Dam loop from Dolgellau

Bwlch y Groes – Lake Vyrnwy Dam loop from Dolgellau

Hard

5.0

(1)

riders

Bwlch y Groes – Lake Vyrnwy Dam loop from Dolgellau

04:57

91.5km

1,600m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: May 14, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Bus stop

Get Directions

23.5 km

Bwlch y Groes

Highlight (Segment) • Mountain Pass

The second highest public road mountain pass in Wales this is definitely one to tick off the cycling bucket list. It is narrow and winding so it is recommended to …

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26.5 km

Bwlch y Groes

Mountain Pass

26.5 km

Bwlch y Groes Climb from Lake Vyrnwy

Highlight (Segment) • Viewpoint

Climbed it 30 odd years ago........with young fit legs!! Recently descended it in heavy rain with bike packing gear - makes for a bottom clenching descent - exercise caution at the bottom, there's a tight left hand bend, beware!!

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39.9 km

Lake Vyrnwy Dam

Highlight • Monument

This is brilliant peice of architecture thats still in use today, you can feel the sheer power of the flow of water down the dam one side, and the peace and tranquility of the lake the other.

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41.7 km

Lake Vyrnwy Straining Tower

Highlight • Monument

Lake Vyrnwy (Welsh: Llyn Efyrnwy, pronounced [ɛˈvərnʊɨ] or Llyn Llanwddyn) is a reservoir in Powys, Wales, built in the 1880s for Liverpool Corporation Waterworks to supply Liverpool with fresh water. …

Translated by Google •

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48.5 km

Hirnant Pass Climb from Rhiwargor

Highlight (Segment) • Viewpoint

There is more climbing on this side of the Hirnant climb starting from Lake Vyrnwy. The 4km climb can be divided into four sections - the first 1km steeply beyond …

Translated by Google •

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54.6 km

View of the Rolling Hills in Parc Cenedlaethol Eryri

Highlight • Climb

Absolutely fantastic views road surface is great climbs take care over cattle grid.
A wonderful experience.

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56.1 km

Coed y Glyn

Forest

61.1 km

Hirnant Riverside at Parc Cenedlaethol Eryri

Highlight • Forest

Absolutely stunning valley to ride up.

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63.1 km

Llangower Station and Bala Lake

Highlight (Segment) • Settlement

Another lovely welsh road, mainly quiet with a perfect view of Lake Bala. Bala is Wale's largest natural lake with it's deep and clear waters. The lake is popular for …

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74.8 km

Coed Pant-gwyn

Forest

91.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

67.7 km

23.0 km

871 m

< 100 m

Surfaces

84.1 km

6.62 km

871 m

< 100 m

Elevation

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

Highest point (540 m)

Lowest point (10 m)

Weather

Monday 18 May

14°C

9°C

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

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Bwlch y Groes – Lake Vyrnwy Dam loop from Dolgellau

Bwlch y Groes

Bwlch y Groes Climb from Lake Vyrnwy

Lake Vyrnwy Dam

Lake Vyrnwy Straining Tower

Hirnant Pass Climb from Rhiwargor

View of the Rolling Hills in Parc Cenedlaethol Eryri

Hirnant Riverside at Parc Cenedlaethol Eryri

Llangower Station and Bala Lake

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