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Anglesey

Llanidan

Top 4 Lakes around Llanidan

Best lakes around Llanidan are found within Anglesey's "Bro'r Llynnoedd" (Lakes district), offering diverse natural beauty and recreational activities. While Llanidan itself does not feature prominent lakes directly, the surrounding area provides easily accessible and notable bodies of water. These lakes are significant for their ecological importance, supporting varied flora and fauna. The region's landscape includes both natural and man-made lakes, contributing to its character.

Best lakes around Llanidan

  • The most popular lakes is Llyn Cefni Reservoir and Dam,…

Last updated: June 30, 2026

Llyn Cefni Reservoir and Dam

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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.

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Llyn Padarn Trail

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After the day walk up to Snowdons peak, or along Crib Goch, or any of the other Welsh 3000s nearby, how better to take in a summers evening than a …

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Padarn Country Park

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Fantastic walking, lakeside views, castle ruins, fascinating industrial heritage, stunning wildlife and views over to Snowdon: what's not to love? The 800-acre (324 ha) Padarn Country Park surrounds Llyn Padarn …

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The Lonely Tree, Llyn Padarn

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Photo subject for sunrise and sunset.

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On a clear day, from this end of Llyn Padarn you’ll get an enticing view of Snowdon and other peaks.
Its absolutely stunning and well worth the ride.

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Popular around Llanidan

Hiking around Llanidan

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AWM
February 21, 2026, Llyn Cefni Reservoir and Dam

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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Beautiful wander around Llyn Padarn via the lonely tree

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On a clear day, from this end of Llyn Padarn you’ll get an enticing view of Snowdon and other peaks. Its absolutely stunning and well worth the ride.

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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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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.

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The Lonely Tree was a Scots pine on a hill near Llanfyllin, Powys, Wales. Visible from much of the town it was a local landmark with several traditions attached to it. The tree was blown over during a storm in February 2014, and despite efforts to save it, the tree was found to be dead in June 2015..

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Great views from the bridge at the western end of Llyn Padarn. Look across the lake at the old Dinorwig slate mining and the Electric Mountain. To the right you can see over Llanberis and up onto Snowdon.

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Frequently Asked Questions

What are the most popular lakes to visit around Llanidan?

While Llanidan itself doesn't have prominent lakes, the surrounding Anglesey 'Lakes district' offers several notable options. Llyn Cefni Reservoir and Dam is a popular man-made lake supplying water to the island, also used for fishing and picnics. Llyn Alaw, Anglesey's largest lake, is a prime spot for birdwatching and angling. Llyn Llywenan is the largest natural lake, known for its rich aquatic life and bird sanctuary status.

Are there family-friendly activities at the lakes near Llanidan?

Yes, several lakes offer family-friendly activities. Llyn Cefni Reservoir and Dam is great for picnics and walks, with trails through meadows and forests. Llyn Alaw features miles of footpaths, picnic areas, and is part of a main cycle trail, making it suitable for families. The Valley Lakes area, particularly around Llyn Maelog, offers short walks and opportunities for wildlife spotting.

What kind of wildlife can I expect to see at the lakes?

The lakes around Llanidan are rich in wildlife, especially birds. Llyn Alaw is a designated Site of Special Scientific Interest (SSSI) and a prime destination for birdwatching, particularly for overwintering birds like Eurasian Teal, northern shoveler, and whooper swans. Llyn Cefni also has bird hides for wildlife spotting. Llyn Llywenan is a sanctuary for birdlife, supporting a black-headed gull colony and breeding wildfowl. The Valley Lakes, including Llyn Penrhyn and Llyn Dinam, are crucial for birdlife, supporting ducks, grebes, and various warblers.

Are there good walking routes around the lakes?

Yes, there are many walking opportunities. Llyn Alaw offers several miles of footpaths. Llyn Cefni is excellent for walks, with trails through meadows and forests, and is accessible via the Lôn Las Cefni cycleway. Llyn Llywenan's surrounding area provides pleasant walks through gentle countryside. A public footpath also circumnavigates Llyn Maelog in the Valley Lakes area, connecting to Rhosneigr.

What is the best time of year to visit the lakes around Llanidan?

The lakes offer different experiences throughout the year. For birdwatching, the winter months are ideal, as many lakes like Llyn Alaw and Llyn Llywenan host overwintering birds. Spring and summer are pleasant for walking, cycling, and enjoying the lush vegetation. Exposed mud flats at Llyn Alaw appear when water levels are low in summer, which can also be interesting for birdlife.

Can I go fishing at the lakes near Llanidan?

Yes, fishing is a popular activity at several lakes. Llyn Alaw is known for fishing, stocked with rainbow trout and containing wild brown trout, making it one of Wales' most productive lakes for angling. The Cefni Angling Association manages Llyn Cefni Reservoir and Dam as a fishery. Llyn Llywenan is also renowned for fishing, and Llyn Coron has been popular with anglers since at least 1874.

Are there any historical or cultural sites near the lakes?

Yes, the region has historical significance. To the south of Llyn Llywenan, you can find Neolithic burial mounds. The Valley Lakes area includes Llyn Cerrig Bach, which is historically significant as the find location of an important Iron Age treasure hoard. Additionally, the disused railway line, Lein Amlwch, cuts across Llyn Cefni, offering a glimpse into the area's industrial past.

What outdoor activities can I do near these lakes besides walking?

Beyond walking, you can enjoy cycling, especially on one of Anglesey's main cycle trails that starts at Llyn Alaw, or the Lôn Las Cefni cycleway near Llyn Cefni. For more structured routes, you can explore various road cycling routes or gravel biking trails around Llanidan, which often pass by or near these beautiful lake areas.

Are there any challenging climbs or viewpoints around the lakes?

While many lake walks are gentle, some areas offer more challenging terrain or rewarding viewpoints. For instance, the Marchlyn Mawr Reservoir Climb, though not directly in Anglesey, is a notable challenging climb in the broader region that offers stunning views. The View of Llyn Padarn from Pont Pen-y-Llyn provides enticing views of Llyn Padarn and surrounding peaks, including the old Dinorwig slate mining area and Electric Mountain.

What makes the Valley Lakes area unique?

The Valley Lakes, including Llyn Maelog, Llyn Penrhyn, and Llyn Dinam, are often called Anglesey's 'mini Lake District.' This area is part of the Valley Wetlands Nature Reserve and is characterized by scattered, reed-fringed lakes and rocky outcrops. It's particularly important for birdlife and offers an unhurried introduction to Anglesey's landscapes, language, and history, with opportunities for short walks and views across the water.

Are there any specific ecological designations for these lakes?

Yes, many of the lakes hold important ecological designations. Llyn Alaw is a designated Site of Special Scientific Interest (SSSI) due to its ecological value. The northeastern end of Llyn Cefni and its surroundings are designated as a nature reserve. Llyn Llywenan is also an SSSI, recognized for its rich aquatic plants and animals. Within the Valley Lakes, Llyn Dinam is a Special Area of Conservation (SAC), and Llyn Traffwll and Llyn Maelog are SSSIs for their plant species and diverse flora and fauna.

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Still not found your perfect lake around Llanidan? Check out the guides of these regions to see even more beautiful places.

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