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MTB trails
United Kingdom
Wales
North Wales
Anglesey

Llyn Llywenan

The best MTB trails around Llyn Llywenan

17

riders

3

rides

Mountain biking around Llyn Llywenan offers accessible routes through a gentle, rolling countryside in western Anglesey, Wales. The region is characterized by Llyn Llywenan, the largest natural freshwater lake on the island, providing expansive lakeside views. Surrounding the lake are wetland habitats and a network of public paths and quiet lanes, suitable for less technical mountain biking and exploring at a relaxed pace. This landscape provides a scenic backdrop for rides, moving between varied surfaces and vistas.

Best mountain bike…

Last updated: May 11, 2026

2

riders

#1.

Bethel Village – Cefni River Railway Viaduct loop from Rhosneigr

28.3km

01:35

220m

220m

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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Easy

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy
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Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy

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Popular around Llyn Llywenan

Cycling around Llyn Llywenan

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Tips from the Community

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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Targi
September 1, 2025, Cefni 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.

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andrew
June 15, 2025, Amlwch Port

there is a small free car park with toilets. and a hut selling ice creams

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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

3

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Railway bridge over head tarmac its smooth a couple of potholes but nice to be away from main road traffic.

3

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Bethel is a very small village with only a couple of shops a church called (Capel Bethel Chapel) and only 2 pubs. I found one little premier shop for water.

3

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Caffi'r Dafarn/ tavern cafe is a beautiful stone building off High St, Bryngwran its beautiful inside and has a large garden area at the rear. Great staff and amazing food and drink.

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Frequently Asked Questions

What kind of terrain can I expect on mountain bike trails around Llyn Llywenan?

The terrain around Llyn Llywenan is characterized by a gentle, rolling countryside, wetland habitats, lakeside paths, and quiet country lanes. You'll find a mix of surfaces, generally suitable for less technical mountain biking and exploring at a relaxed pace, offering scenic views rather than extreme challenges.

Are there mountain bike trails suitable for beginners or families in Llyn Llywenan?

Yes, Llyn Llywenan is an excellent destination for beginners and families. The region's gentle gradients and well-established paths make it accessible for varying experience levels. Most routes are classified as easy to moderate. An easy option is the Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey, which is just over 11 km long.

Are there any circular mountain bike routes around Llyn Llywenan?

Yes, many of the mountain bike routes in the area are circular, allowing you to start and finish in the same location. For example, the Bethel Village – Cefni River Railway Viaduct loop from Rhosneigr is an easy 28.3 km circular trail offering views of the Cefni River.

What natural features or landmarks can I see while mountain biking near Llyn Llywenan?

Llyn Llywenan itself is the largest natural freshwater lake on Anglesey, offering expansive lakeside views. The area is a Site of Special Scientific Interest (SSSI) due to its rare aquatic plants and diverse birdlife. You can also find two ancient Neolithic burial mounds just south of the lake, offering a glimpse into the region's history.

Are the mountain bike trails around Llyn Llywenan dog-friendly?

Many of the paths and quiet country lanes around Llyn Llywenan are suitable for cycling with dogs, provided they are well-behaved and kept under control, especially near livestock or in nature-sensitive areas like the SSSI. Always check local signage for specific restrictions.

What is the best time of year to go mountain biking in Llyn Llywenan?

The gentle, rolling countryside around Llyn Llywenan is enjoyable throughout much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery. Summer is also popular, but trails can be busier. Winter rides are possible, but be prepared for potentially wetter conditions on some paths.

Where can I find parking for mountain biking near Llyn Llywenan?

Parking is generally available in nearby villages and towns such as Rhosneigr or Llannerch-y-Medd, which serve as common starting points for many routes. Always look for designated parking areas and be mindful of local residents.

Are there any cafes or pubs near the mountain bike routes in Llyn Llywenan?

Yes, you'll find amenities in the villages surrounding Llyn Llywenan. For instance, the Dreamboat Campervan Café – Sauna Bach loop from Rhosneigr starts near a café, and other routes pass through or near villages where you can find refreshments.

How long are the mountain bike trails in the Llyn Llywenan area?

The trails vary in length, catering to different preferences. You can find shorter, easy routes like the Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey at 11.7 km, or longer, moderate options such as the Llynnon Mill – Cemlyn Bay Nature Reserve loop from Llannerch-y-Medd, which spans nearly 55 km.

What are the typical elevation gains on mountain bike trails around Llyn Llywenan?

Given the gentle, rolling countryside, elevation gains are generally moderate. For example, an easy route like the Porth Trecastell Beach – Rhosneigr Beach loop from Rhosneigr has an elevation gain of around 187 meters over 27 km, while a moderate route might have more, but still manageable, climbs.

Is public transport available to access mountain bike trails near Llyn Llywenan?

Public transport options, such as local bus services, connect some of the villages and towns around Llyn Llywenan. However, services might be less frequent, especially in more rural areas. It's advisable to check local bus schedules in advance if you plan to use public transport to reach trailheads.

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