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Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Isle of Anglesey

Routes

Bike touring routes & trails

Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Isle of Anglesey

Easy

5.0

(1)

riders

Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Isle of Anglesey

01:10

18.1km

100m

Cycling

Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: May 14, 2026

Tips

Includes a segment in which cycling is not permitted

After 12.4 km for 198 m

Waypoints

Start point

Bus stop

Get Directions

1.07 km

Llyn Cefni Reservoir and Dam

Highlight • Structure

Llyn Cefni is a reservoir in central Anglesey. It's managed by Welsh Water. It was completed in 1951 and supplies water to most of Anglesey.

Tip by

2.31 km

Llyn Cefni Dam

Highlight • Monument

Llyn Cefni Dam

During World War II, a water scheme was devised for the town of Llangefni in central Anglesey. It involved water from a local source being pumped to …

Tip by

5.31 km

We rode from the North back to Llangefni and so rode along the impressive reservoir at the top of the valley then cruised all through the woods to the town itself on a smooth very rideable track. Beautiful and quiet.

Tip by

7.99 km

Lon Las Cefni cycle path along the Afon Cefni

Highlight • Cycleway

Afon Cefni is one of the major rivers on the island of Anglesey, Wales. It is 16.9 kilometres long. Its source is near to the village of Capel Coch, before …

Tip by

12.2 km

Llangefni Clock Tower

Highlight • Structure

Llangefni (meaning "church on the River Cefni", Welsh pronunciation: [ɬaŋˈɡɛvni]) population 5,116, making it the second-largest town in the county and the largest on the island. The community includes the …

Tip by

12.2 km

Bulkley Square, Llangefni

Highlight • Cafe

Llangefni is the county town of Anglesey and the administrative centre. There is a museum and arts gallery as well as plenty of pubs and cafes. Mona House café on …

Tip by

17.5 km

Afon Cefni River

Highlight • Other

18.1 km

End point

Bus stop

Way Types & Surfaces

Way Types

9.15 km

3.61 km

3.43 km

943 m

713 m

204 m

Surfaces

6.66 km

6.26 km

3.22 km

1.82 km

105 m

Elevation

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

Weather

Wednesday 15 July

25°C

14°C

0 %

Additional weather tips

Max wind speed: 23.0 km/h

to get more detailed weather forecasts along your route

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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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Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Isle of Anglesey

Llyn Cefni

Llyn Cefni Reservoir and Dam

Llyn Cefni Dam

Afon Cefni River Trail

Lon Las Cefni cycle path along the Afon Cefni

Llangefni Clock Tower

Bulkley Square, Llangefni

Afon Cefni River

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