4.6
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3,392
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Bus station hiking trails around Cors Erddreiniog offer access to a unique wetland ecosystem in Anglesey. This region is characterized by internationally rare fenland habitats, extensive reedbeds, woodlands, heathlands, and small lakes. The terrain includes boardwalks and waymarked paths through diverse environments, providing varied hiking experiences. Its significance is recognized through designations as a National Nature Reserve and Site of Special Scientific Interest.
Last updated: May 13, 2026
2
hikers
4.96km
01:24
110m
110m
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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Great views of the east coast on the descent from Mynydd Bodafon.
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There are over 30 hiking trails accessible directly from bus stations around Cors Erddreiniog. These routes offer a variety of experiences, from easy strolls to more moderate adventures.
The trails vary in difficulty, with 14 easy routes and 18 moderate options. This means you can find suitable walks whether you're looking for a gentle outing or a more challenging hike.
Yes, many of the routes accessible from bus stations are circular, allowing you to start and end your hike at the same point. For example, the easy Mynydd Bodafon Summit – Mynydd Bodafon Summit loop from Brynrefail is a great circular option, covering nearly 5 km. You can find more details here: Mynydd Bodafon Summit loop.
The trails around Cors Erddreiniog offer a diverse range of landscapes, including rare fenland habitats, reedbeds, woodlands, and heathlands. You'll experience the unique mosaic of environments that make this area a National Nature Reserve, with open fenland views and distinctive vegetation. Some routes may also pass by small lakes like Llyn yr Wyth Eidion.
Cors Erddreiniog is rich in wildlife. Hikers can spot a wide variety of birds, including hen harriers in winter and reed warblers in summer. The reserve is also home to numerous insects, especially butterflies, moths, damselflies, and dragonflies, including the rare marsh fritillary butterfly. Lucky hikers might also encounter toads, adders, otters, and barn owls at dusk.
Yes, there are several easy routes suitable for families. The reserve itself has a waymarked 'Fen and Pond Walk' that is graded as easy. For a specific komoot route, consider the easy Red Squirrel Spotting Area – Red Squirrel Viewing Spot loop from Llangefni, which is just over 3 km long and offers a pleasant walk for all ages: Red Squirrel Viewing Spot loop.
Many trails in the wider Anglesey area are dog-friendly, but it's crucial to check specific reserve rules, especially in sensitive nature areas like Cors Erddreiniog, which is a National Nature Reserve. Always keep dogs on a lead to protect wildlife and livestock, and follow the Countryside Code. For routes outside the immediate fen, such as the Red Squirrel Spotting Area – Llyn Cefni Reservoir and Dam loop from Llangefni, dogs are generally welcome on leads: Llyn Cefni Reservoir and Dam loop.
The best time to hike depends on your interests. Spring and summer (April to August) are ideal for observing the rich flora, including orchids, and abundant insect life like butterflies and dragonflies. Autumn offers beautiful colours, while winter provides opportunities to spot specific bird species like hen harriers. Be aware that paths can be muddy after wet weather, especially in the fen areas.
The area is highly rated by the komoot community, with an average score of 4.6 stars. Reviewers often praise the unique wetland scenery, the tranquility of the fen, and the opportunities for wildlife spotting. The accessibility via public transport is also a frequently appreciated aspect.
Yes, if you're looking for a longer, more moderate challenge, consider routes like the Llyn Cefni Reservoir and Dam – Afon Cefni River loop from Llangefni. This route covers approximately 8.4 km and offers a good workout while exploring the local waterways: Afon Cefni River loop.
Cors Erddreiniog is internationally renowned for its orchid-rich habitats. You might spot species such as the narrow-leaved marsh orchid, northern marsh orchid, lesser butterfly orchid, marsh helleborine, and the rare fly orchid. Other notable plants include marsh gentian, monk's hood, and the carnivorous sundew. These are best seen during spring and summer.


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