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Maentwrog Dam – Llyn Trawsfynydd loop from Trawsfynydd

Routes

Bike touring routes & trails

Maentwrog Dam – Llyn Trawsfynydd loop from Trawsfynydd

Moderate

riders

Maentwrog Dam – Llyn Trawsfynydd loop from Trawsfynydd

01:41

20.8km

310m

Cycling

Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: July 28, 2026

Tips

Includes a segment in which cycling is not permitted

After 2.14 km for 156 m

Waypoints

Start point

Bus stop

Get Directions

2.21 km

Llyn Trawsfynydd Bridge

Highlight • Bridge

This footbridge was built to replace some of the lost footpaths that the lake flooded. The old track here linked Trawsfynydd village with the old chapel. It's a metal lattice …

Tip by

5.33 km

Stone Benches With View of Llyn Tegid

Highlight • Viewpoint

Since there is no resting place at the highest point of the lake circuit, you are all the happier a little below.

Translated by Google •

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5.35 km

Picnic Area with View of Llyn Trawsfynydd

Highlight • Viewpoint

This picnic spot provides lovely views across Llyn Trawsfynydd and the surrounding mountains. The lake is artificial, created in the 1920s to supply the Maentwrog power station, though it later …

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5.56 km

View of Llyn Trawsfynydd

Highlight • Lake

Surprisingly steep uphill to here, but good views and the high point of the circuit around the Llyn.

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7.51 km

Maentwrog Dam was built in the 1920s to provide a source of hydroelectric power for the Maentwrog power station. Later in 1965 the lake also became a source of cooling water for the Trawsyfynydd nuclear power station.

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9.45 km

Trawsfynydd Nuclear Power Station

Highlight • Other

Trawsfynydd nuclear power station was the only inland nuclear power plant in the UK. It was able to be situated here because of the large lake that provided sufficient cooling …

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9.73 km

Llyn Trawsfynydd

Highlight • Structure

An enormous man-made reservoir, Llyn Trawsfynydd originally provided cooling water for the local nuclear power station (now undergoing decommissioning). The lake lies in the west of Snowdonia National Park and …

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10.3 km

Llyn Trawsfynydd Visitor Centre

Highlight • Cafe

Cafe/restaurant and fishing centre at the lake. Open Thurs-Sun 8-2:30

Tip by

13.5 km

Llyn yr Oerfel

Lake

20.8 km

End point

Bus stop

Way Types & Surfaces

Way Types

7.51 km

7.06 km

3.72 km

1.81 km

490 m

168 m

Surfaces

7.94 km

7.29 km

4.83 km

705 m

Elevation

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

Highest point (320 m)

Lowest point (190 m)

Weather

Friday 31 July

18°C

9°C

12 %

Additional weather tips

Max wind speed: 17.0 km/h

to get more detailed weather forecasts along your route

Comments

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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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Maentwrog Dam – Llyn Trawsfynydd loop from Trawsfynydd

Llyn Trawsfynydd Bridge

Stone Benches With View of Llyn Tegid

Picnic Area with View of Llyn Trawsfynydd

View of Llyn Trawsfynydd

Maentwrog Dam

Trawsfynydd Nuclear Power Station

Llyn Trawsfynydd

Llyn Trawsfynydd Visitor Centre

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