The best walks and hikes around Trewalchmai
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2,535
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73
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Hikes around Trewalchmai explore the heart of Anglesey, centered on the Llyn Cefni reservoir and its surrounding landscape. The region is characterized by well-maintained paths through woodlands, along the reservoir's shore, and through the Afon Cefni river valley. Most walking trails near Trewalchmai Anglesey are on relatively flat terrain with minimal elevation gain, making them accessible for various fitness levels.
Best hiking trails around Trewalchmai
- The most popular hiking route is Cefni reservoir loop from Llangefni — Anglesey, a…
Last updated: April 25, 2026
4.4
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210
hikers
11.1km
02:53
70m
70m
Hike the moderate Lôn Las Cefni Trail, a 6.9-mile route through diverse landscapes and wildlife havens on Anglesey, including Llyn Cefni Res
4.6
(14)
183
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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4.6
(14)
180
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
4.8
(13)
151
hikers
7.88km
02:03
50m
50m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.7
(10)
144
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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Tips from the Community
Great loop around the reservoir, all kinds of gravel.
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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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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.
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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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Frequently Asked Questions
Are the hiking trails around Trewalchmai suitable for dogs?
Yes, many trails in the Trewalchmai area are dog-friendly. The paths around Llyn Cefni and through the surrounding woodlands are great for walking with dogs. However, it's recommended to keep them on a lead, especially in areas with livestock and within nature reserves like The Dingle to protect wildlife, including the native red squirrels.
What are some good hikes for beginners or families?
The area is excellent for beginners and families due to its relatively flat terrain. Many of the 48 easy trails are perfect for a gentle outing. A great option is the Red Squirrel Spotting Area – Llyn Cefni Reservoir and Dam loop from Llangefni, which is a short and accessible walk through scenic woodland.
Are there many circular walks available?
Yes, the majority of popular routes around Trewalchmai are circular walks, or loops. This makes planning a hike very convenient as you'll end up back where you started. The trails are designed to loop around Llyn Cefni reservoir or through the adjacent woodlands, offering varied scenery without the need to retrace your steps.
Where can I see wildlife, like the red squirrels?
The Dingle (Nant y Pandy) Local Nature Reserve is one of the best places on Anglesey to spot native red squirrels. A dedicated trail, the Llyn Cefni Reservoir and Dam – Red Squirrel Spotting Area loop from Llangwyllog, takes you through the heart of their woodland habitat. The reservoir area is also great for birdwatching, with herons and various waterfowl often seen.
How do I get to the Anglesey Coast Path from Trewalchmai?
Trewalchmai's central location makes it a great base for exploring the Anglesey Coast Path. As the path encircles the island, you can drive to various starting points in 15-30 minutes. Popular access points include Rhosneigr to the west, Newborough to the south, or Holyhead to the northwest, where you can tackle different sections of the famous coastal trail.
What is the terrain like on the Trewalchmai trails?
Most hiking trails immediately around Trewalchmai feature gentle and well-maintained paths. You can expect woodland tracks, gravel paths along the reservoir, and boardwalks in nature reserves like The Dingle. The terrain is generally flat with minimal elevation gain, making it accessible for most fitness levels.
Where can I find parking for the walks?
The main trailheads for hikes around Llyn Cefni have dedicated parking areas, such as the one near the dam. For other popular spots on Anglesey, like Breakwater Country Park or Parc Arfordirol Penrhos Coastal Park, you will also find designated car parks, though some may require a fee.
Are there any hikes that include historical sites?
While the immediate Trewalchmai trails focus on natural scenery, Anglesey is rich in history. You can easily incorporate historical sites into a day's outing. A short drive allows you to start hikes near ancient burial chambers, standing stones, or historic sites like South Stack Lighthouse near Holyhead, which can be combined with a walk along the coast path.
What do other hikers enjoy most about the trails near Trewalchmai?
The area is highly rated by the komoot community. Reviewers often praise the peaceful atmosphere of the reservoir, the well-maintained paths through the woodlands, and the excellent opportunities for wildlife spotting, particularly the rare red squirrels in The Dingle Nature Reserve.
How many hiking trails are there to choose from around Trewalchmai?
There are over 75 hiking routes to explore in the Trewalchmai area. These range from short, easy walks suitable for an afternoon stroll to more moderate, longer circuits around the reservoir, offering plenty of options for all abilities.
Can I cycle near Trewalchmai?
Absolutely. Trewalchmai is an excellent spot for cyclists. The Lôn Las Cefni, a 13-mile traffic-free cycle path, runs directly from Llyn Cefni down to the beautiful Newborough Forest. It's a fantastic, family-friendly route that showcases the island's diverse landscapes.
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