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Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Newborough

Routes

Bike touring routes & trails

Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Newborough

Moderate

4.7

(12)

120

riders

Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Newborough

02:31

41.0km

170m

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 25, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Tirwedd Cenedlaethol Ynys Môn

SoDdGA Cors Ddyga

Waypoints

Start point

Bus stop

Get Directions

11.9 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

15.9 km

The Dingle (Nant y Pandy) Nature Reserve

Nature Reserve

17.6 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 …

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17.7 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

18.8 km

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 …

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23.9 km

Afon Cefni River Trail

Highlight (Segment) • River

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

30.8 km

Stone bridge over the River Cefni

Highlight • River

Pont Marquis Bridge
Spanning the Afon Cefni, carrying the Trefdraeth to Llangaffo road, c. 3km ENE of Malltraeth. The bridge, which is Grade II listed, was built in the early …

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33.9 km

The Cob Path and Cefni Estuary Views

Highlight • Viewpoint

The Cob (about a mile in length) is an elevated tarmac footpath/cycle trail which runs parallel to the road but about 150 feet (50 m) from it.

It provides excellent …

Tip by

36.9 km

Filling Mill Ruin/Weaving Works

Ruins

41.0 km

End point

Bus stop

Way Types & Surfaces

Way Types

20.1 km

11.2 km

4.68 km

3.69 km

685 m

511 m

225 m

Surfaces

19.7 km

15.5 km

3.55 km

2.04 km

258 m

Elevation

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

Highest point (50 m)

Lowest point (0 m)

Weather

Friday 14 August

21°C

12°C

11 %

Additional weather tips

Max wind speed: 16.0 km/h

to get more detailed weather forecasts along your route

Comments

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Llyn Cefni Reservoir and Dam – Afon Cefni River Trail loop from Newborough

Lon Las Cefni cycle path along the Afon Cefni

Llyn Cefni Dam

Llyn Cefni Reservoir and Dam

Llyn Cefni

Llangefni Clock Tower

Afon Cefni River Trail

Stone bridge over the River Cefni

The Cob Path and Cefni Estuary Views

Nearby routes

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