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Marchlyn Bach Reservoir – View of Marchlyn Bach loop from Bethesda

Routes

Bike touring routes & trails

Marchlyn Bach Reservoir – View of Marchlyn Bach loop from Bethesda

Hard

riders

Marchlyn Bach Reservoir – View of Marchlyn Bach loop from Bethesda

02:05

26.7km

580m

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 10, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

Start point

Bus stop

Get Directions

1.82 km

Waterfalls on the River Ogwen

Highlight • Waterfall

There are several waterfalls along River Ogwen and this is the perfect spot to sit on the serene riverbank and see the water breaking over large slabs. This river travels …

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2.12 km

Penrhyn Quarry

Highlight • Historical Site

Penrhyn Quarry was the largest slate quarry in the world by the end of the 19th century. In its prime, it employed nearly 3,000 men who toiled in tunnels that …

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10.7 km

Marchlyn Bach Reservoir

Highlight • Lake

Marchlyn Bach Reservoir
The Marchlyn Bach dam and reservoir is not part of the Dinorwig HEP scheme. It is a reservoir owned by Dwr Cymru (Welsh Water).
The road in …

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10.9 km

From this point along the path is a beautiful view of the magnificent Marchlyn Bach. This is also a great access point to many great trails where you can discover some of the breathtaking peaks of Parc Cenedlaethol Eryri.

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12.9 km

View of Snowdon

Highlight • Summit

super ride down through the slate quarry but watch out for punctures on the sharp slate

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20.4 km

Parc y Bryniau

Forest

23.8 km

Parc Coed Moch

Forest

26.7 km

End point

Bus stop

Way Types & Surfaces

Way Types

19.4 km

3.06 km

2.45 km

1.49 km

234 m

107 m

Surfaces

17.1 km

4.56 km

2.68 km

2.36 km

Elevation

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

Highest point (560 m)

Lowest point (100 m)

Weather

Today

Wednesday 3 June

14°C

9°C

76 %

Additional weather tips

Max wind speed: 31.0 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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Marchlyn Bach Reservoir – View of Marchlyn Bach loop from Bethesda

Waterfalls on the River Ogwen

Penrhyn Quarry

Marchlyn Bach Reservoir

View of Marchlyn Bach

View of Snowdon

Nearby routes

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