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Hiking trails & Routes

Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey

Hiking trails & Routes

Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey

Easy

4.7

(18)

199

hikers

Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey

01:38

6.29km

30m

Hiking

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 7, 2026

Waypoints

A

Start point

Parking

1

2.82 km

Cefni Forest

Highlight • Forest

Cefni Forest on Anglesey surrounds Llyn Cefni reservoir near Llangefni. It offers peaceful woodland trails for walking and cycling, linking to the Lon Las Cefni route. The forest is a sanctuary for red squirrels and diverse birdlife, making it a perfect spot for quiet nature exploration and wildlife watching.

Tip by

2

4.41 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 two settling tanks in the Dingle part of the town. From here the water was pumped across the river to a reservoir and water tower, on the site of the present Pennant Estate. These arrangements became redundant with the building of the Cefni Reservoir, which was completed in 1951, but the settling tanks and pumping station survive in Llangefni to this day. The new scheme was designed to supply most of the water needs for the people of Anglesey for the foreseeable future

Tip by

3

4.47 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

4

4.53 km

Cefni Reservoir Dam

Highlight • Structure

Great loop around the reservoir, all kinds of gravel.

Tip by

5

5.65 km

Llyn Cefni

Highlight • Lake

6

6.11 km

Afon Cefni River

Highlight • Other

7

6.12 km

River Entering Llyn Llangefni

Highlight • Lake

B

6.29 km

End point

Parking

Way Types & Surfaces

Way Types

3.55 km

2.21 km

448 m

< 100 m

Surfaces

4.21 km

1.30 km

448 m

265 m

< 100 m

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Elevation

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Weather

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Saturday 10 October

14°C

8°C

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