4.5
(160)
1,847
hikers
15
hikes
Bus station hiking trails around Cefni Reservoir are primarily characterized by their gentle terrain, encircling the reservoir and traversing adjacent woodlands. The landscape features the expansive Llyn Cefni reservoir, fed by the Afon Cefni river, and surrounded by Cefni Forest. Elevation changes are minimal, making the area accessible for various fitness levels. The region also includes historical elements like the Anglesey Central Railway tracks and dedicated nature reserves for wildlife observation.
Last updated: June 29, 2026
21
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.7
(10)
153
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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4.0
(2)
46
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
21
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
6
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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We visited for the Parkrun, which was cancelled whilst a walkway is fixed (some more weeks, I would expect). You can still access the lake along the disused railway line for part of the way - but not a good surface for running. Then there is a path around the lake with views across the lake and stretches through the woods, lovely, if rather muddy in places following wet weather. In total about 9 km around. Hope to do this again in the Spring with the promise of wild daffodils and perhaps a red squirrel.
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Quiet paths easy cycling crosses deserted railway line still present, which there trying to reopen
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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
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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 village of Rhosmeirch. Wonderful welsh town with all the shop can get busy in summer holidays.
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The largest town on Anglesey (Holyhead is twice the size but is technically on Holy Island). Now bypassed by the island’s main roads which actually makes it a decent hub if you’re cycling across the south of the island.
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We saw two red squirrels in the area so they are really there!
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Located in Llangefni right out side the nature reserve the dingle
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There are 15 hiking trails around Cefni Reservoir that are easily accessible from bus stations. These routes offer a mix of easy and moderate difficulty levels, ensuring options for various preferences.
The terrain around Cefni Reservoir is generally gentle, making it accessible for a wide range of hikers. You can expect paths that follow the reservoir's banks, wind through peaceful woodlands like Cefni Forest, and trace sections of the Afon Cefni river, offering varied and picturesque views.
Yes, Cefni Reservoir offers several easy, family-friendly routes. For example, the Llyn Cefni Reservoir and Dam – Afon Cefni River loop from Isle of Anglesey is an easy 4.6 km hike, perfect for a leisurely outing. Another great option is the Red Squirrel Spotting Area – Llyn Cefni Reservoir and Dam loop from Llangefni, which is 5.0 km and also easy.
Many of the trails around Cefni Reservoir are circular, allowing you to start and end your hike conveniently near a bus stop. The Llyn Cefni Reservoir and Dam – Afon Cefni River loop from Llangefni is a moderate 8.3 km circular route that offers a comprehensive experience of the area.
Cefni Reservoir is a haven for wildlife. Hikers often spot red squirrels, especially in areas like Cefni Forest and the nearby Dingle Nature Reserve. The reservoir itself attracts various bird species, including grebes, coots, swans, and teals, with opportunities to see birds of prey like red kites.
Yes, several notable features enhance the hiking experience. The Llyn Cefni Dam is a prominent man-made landmark, and you can also observe the tracks of the disused Anglesey Central Railway crossing the water. Bird hides are present in the northeastern part of the reservoir, offering excellent spots for wildlife observation.
Generally, the trails around Cefni Reservoir are dog-friendly, making it a great place to hike with your canine companion. However, always keep dogs under control, especially near wildlife and livestock, and be mindful of local signage regarding leads or restricted areas.
The area is highly rated by the komoot community, with an average score of 4.7 stars from 149 ratings. Reviewers often praise the serene waterscapes, peaceful woodlands, and the accessibility of the trails, making it a popular choice for nature lovers and families alike.
For those seeking a moderate challenge, the Llyn Cefni Dam – Llyn Cefni Reservoir and Dam loop from Llangefni is a great option. This 7.6 km route offers more extensive exploration of the reservoir's perimeter with slightly more elevation gain compared to the easier trails.
Cefni Reservoir offers enjoyable hiking experiences throughout the year. Spring brings blooming flora and active wildlife, while autumn showcases beautiful fall colors in the woodlands. Summer is ideal for longer days, and even winter can be picturesque, though paths might be muddier. Always check local weather conditions before heading out.


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