4.3
(11)
66
riders
7
rides
Mountain biking around Pentraeth offers diverse terrain across the Isle of Anglesey. The region features coastal paths, dense forests, and tranquil reservoir routes. Trails often follow river valleys and forest tracks, with generally gentle elevation changes. This provides a mix of easy and moderate mountain bike trails suitable for various skill levels.
Last updated: June 24, 2026
5.0
(4)
22
riders
43.0km
02:38
130m
130m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(4)
32
riders
36.4km
02:39
550m
550m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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7
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
3.0
(2)
3
riders
18.5km
01:10
250m
250m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.0
(1)
2
riders
26.6km
01:44
220m
220m
Easy mountain bike ride. Great for any fitness level. 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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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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Great views of Bangor Cathedral looking up towards the hill
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The visitor centre is located on the A5, approximately 5 miles south of Bethesda and approximately 4 miles west of Capel Curig, on the western side of Llyn Ogwen. There are a number of facilities including toilets, disabled toilets, an information room, public wifi and a small kiosk selling hot and cold snacks. From the visitor centre you can start a range of walks and climbs in the area. The most popular is the walk to Wales' first ever national nature reserve, the beautiful Cwm Idwal, a glacial lake with a mountainous backdrop. (Cwm Idwal National Nature Reserve)
11
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There are 8 mountain bike trails around Pentraeth listed on komoot, offering a variety of experiences across the Isle of Anglesey.
Yes, Pentraeth offers 5 easy mountain bike trails. A good option for beginners is the Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey, which is 7.3 miles (11.7 km) long and generally takes about 50 minutes to complete.
For longer rides, consider the Llanddwyn Beach – Newborough Forest Trail loop from Anglesey, which spans 26.7 miles (43.0 km), or the Llyn Ogwen – Nant Ffrancon Cycle Route loop from Bangor, covering 22.6 miles (36.4 km).
Many of the easy trails are suitable for families. The Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey is a relatively short and gentle option, ideal for a family outing. The region's trails often follow forest tracks and reservoir paths, providing a safe and enjoyable environment.
While there are no trails rated as 'difficult' in the immediate Pentraeth area, there are 3 moderate routes that offer more of a challenge. The Llyn Ogwen – Nant Ffrancon Cycle Route loop from Bangor, for example, features varied terrain and more significant elevation changes, making it a good option for experienced riders seeking a moderate challenge.
Spring and autumn generally offer the most pleasant conditions for mountain biking in Pentraeth, with milder temperatures and less rainfall. Summer can also be good, but trails may be busier, especially coastal paths. Winter can be wet, leading to muddy conditions on some trails.
Absolutely. Many trails offer scenic views, particularly those along the coast or around reservoirs. For panoramic vistas, consider routes that pass near Mynydd Bodafon Summit or offer glimpses of Red Wharf Bay. The Llanddwyn Beach – Newborough Forest Trail loop from Anglesey combines coastal scenery with forest tracks.
Yes, most of the mountain bike trails around Pentraeth are designed as loops. Examples include the Llanddwyn Beach – Newborough Forest Trail loop from Anglesey and the Cefni Forest – Llyn Cefni Reservoir and Dam loop from Isle of Anglesey, allowing you to start and finish at the same point.
You can encounter several interesting landmarks. The Llyn Cefni Reservoir and Dam is a prominent feature on some routes. Other notable attractions in the wider area include the historic Beaumaris Castle and the ancient Bryn Celli Ddu burial chamber, though these may require a slight detour from the immediate trails.
Yes, there are options for refreshments. The Lligwy Beach Café & Shop – Lligwy Beach loop from Brynrefail route, for instance, passes by a cafe, offering a convenient stop. Many villages and towns in the wider Anglesey area will have cafes and pubs for post-ride refreshments.
The mountain biking experience in Pentraeth is highly rated by the komoot community, with an average score of 4.3 stars from 10 reviews. Riders often praise the diverse terrain, which includes coastal paths, dense forests, and tranquil reservoir routes, providing a good mix for various skill levels.


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