Hard bike ride. Very good fitness required. You may need to push your bike for some segments of this route. The starting point of the route is right next to a parking lot.

Last updated: November 26, 2025

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Tips

Your route passes through a protected area

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Parking

Get Directions

1.34 km

Lake Vyrnwy and Water Tower

Highlight (Segment) • Cycleway

Lake Vyrnwy is considered to be Wales’ most beautiful lake. To cycle around its steeply wooded shoreline is a wonderful experience and to be done at a slow cadence. This …

Tip by

16.9 km

View of Lake Vyrnwy

Highlight • Lake

Peaceful hidden beach where the river Eunant joins Llyn Llanwddyn at the north-west corner of the lake.

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21.2 km

Bwlch y Groes Pass

Highlight • Mountain Pass

Whether on a road bike or touring, this mountain pass is not to be missed, smooth surfaces, little traffic, ups and downs all the way... watch out for the sheep..

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22.6 km

View of the Valley at the Wooden Cross

Highlight • Viewpoint

22.8 km

Bwlch y Groes (Hellfire Pass)

Highlight (Segment) • Mountain Pass

Tough road climb, not for the faint hearted! The official top 100 climbs finishes just left of the fork or turn right and descend to the lake.

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26.6 km

Bwlch y Groes

Mountain Pass

26.7 km

Bwlch y Groes Pass

Highlight (Segment) • Viewpoint

Bwlch y Groes is the second highest public road mountain pass in Wales, with a summit altitude of 1,788 ft (545 m). It’s also known as ‘Hellfire Pass’.

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40.3 km

Lake Vyrnwy and Dam

Highlight • Bridge

Park at the very top of the Lake if arriving in a car. Note that some sections can get closed due to rock falls at the top of the Lake near the Waterfall Car Park.

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42.0 km

Straining Tower at Lake Vyrnwy

Highlight • Lake

The Straining Tower at Lake Vyrnwy serves as an intake tower designed for extracting water from the lake.

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50.0 km

End point

Parking

Way Types & Surfaces

Way Types

48.0 km

1.47 km

373 m

105 m

Surfaces

47.3 km

1.84 km

727 m

105 m

Elevation

Highest point (540 m)

Lowest point (230 m)

Weather

Today

Thursday 4 December

6°C

2°C

69 %

If you start your activity now...

Max wind speed: 13.0 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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Lake Vyrnwy and Water Tower

View of Lake Vyrnwy

Bwlch y Groes Pass

View of the Valley at the Wooden Cross

Bwlch y Groes (Hellfire Pass)

Bwlch y Groes Pass

Lake Vyrnwy and Dam

Straining Tower at Lake Vyrnwy

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