4.3
(178)
3,411
riders
10
rides
Mountain biking around Llyn Cwm Bychan offers routes through the rugged Rhinogydd mountains within Snowdonia National Park. The area features the Llyn Cwm Bychan lake, the scenic Afon Artro valley, and historical paths like the Roman Steps. This landscape is characterized by gnarled gritstone peaks, heather-clad slopes, and picturesque oak woods, providing a diverse terrain for mountain bikers. The remote ambiance and varied natural features make it a compelling destination for outdoor activities.
Last updated: June 24, 2026
3.5
(2)
2
riders
18.5km
01:40
450m
450m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4
riders
62.8km
04:51
1,210m
1,210m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

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3.0
(1)
2
riders
14.5km
01:04
290m
290m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
2
riders
23.3km
01:43
460m
460m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
5
riders
26.5km
02:10
610m
610m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Stop, look out and listen are the recommendations (to be read on the sign) that you must follow when crossing the track here. It is an unguarded crossing on this railway for tourist trains.
9
0
Insanely steep at 37.45% early on but eases off quickly.
0
0
Tis is the crossing of the Ffestiniog Welsh Highland Railway at Rhyd Ddu. once through the crossing the surface becomes compact gravel and climbing. It is rideable but takes effort
1
0
Excellent sight looking across Llyn Peris which is 503mtrs above sea level. Dinorwig hydroelectric power station is straight across the lake, this generates 1728MW of power. There are 16 kilometres of deep tunnels in Elidir Mountain. This was opened in 1984
0
0
If you want to park here, you have to reserve a parking space in advance for 20 GBP. We didn't manage to do it, as everything was fully booked. You can then park in Llanberies and take the Sherpa Bus S1 or S2 to Pen y Pass. The bus runs every half hour. From Pen y Pass, you can then choose the Miner's Track or Pyg Track. Have fun!
2
0
Right opposite the layby are the two main blocks - a good description and link to the topo is at https://www.climber.co.uk/outdoor/bouldering/around-the-bloc-the-cromlech-boulders-llanberis/ There are more higher up on the hill and you will find boulderars here at most times of the weather permits.
3
0
Currently parking is pre-booking only! All others are directed to the P+R in the village and need to get up by bus or walk.
3
0
Mountain biking around Llyn Cwm Bychan offers a diverse experience, from scenic valley paths to rugged mountain tracks within the wild Rhinogydd mountains. The area is known for its gnarled gritstone peaks, heather-clad slopes, and picturesque oak woods, providing a rewarding challenge for various skill levels. Some routes may even require pushing your bike through tougher sections.
Komoot features 10 mountain bike trails around Llyn Cwm Bychan. These routes cater to different abilities, with 2 easy, 6 moderate, and 2 difficult options, ensuring there's a trail for every rider.
Yes, there are easy trails available. For a relatively gentle ride with historical views, consider the Harlech Castle – Harlech Castle loop from Harlech. This 14.5 km path offers views of the historic castle and surrounding coastline, making it a good option for those looking for a less strenuous ride.
For experienced riders seeking a challenge, the Pen-y-Pass – Telegraph Valley (Maesgwm) loop from Penrhyndeudraeth is a difficult 62.9 km trail leading through demanding mountain terrain. This route typically takes almost 5 hours to complete and offers a significant test of endurance and skill.
The region is rich in natural beauty and historical landmarks. You'll encounter the dark, peaty waters of Llyn Cwm Bychan lake, rugged Rhinogydd mountains, and scenic oak woodlands. A notable historical feature is the Roman Steps, a medieval packhorse track offering a challenging route through a rocky ravine. The Cefnfilltir Standing Stone – Afon Artro Riverside Path loop from Harlech also takes you past ancient standing stones and along the picturesque Afon Artro valley.
Yes, many of the routes in the area are loops. For example, the popular Afon Artro Riverside Path – Victoria Inn loop from Llanbedr is a 26.5 km circular trail that follows the scenic Afon Artro valley. Another option is the View of Llyn Tanygrisiau – Maentwrog Dam loop from Talsarnau, a moderate 18.5 km ride offering diverse scenery.
The mountain bike trails around Llyn Cwm Bychan are highly rated by the komoot community, with an average score of 4.3 stars from over 170 reviews. More than 3,300 mountain bikers have used komoot to explore the varied terrain, often praising the wild, rugged beauty and the sense of remote tranquility the area offers.
While specific dog-friendly trail designations aren't always available, the remote and natural environment of Llyn Cwm Bychan generally welcomes well-behaved dogs on trails, especially if kept under control. Always be mindful of livestock and local regulations, particularly within Snowdonia National Park. The varied terrain, from valley paths to mountain tracks, offers plenty of exploration opportunities for you and your canine companion.
The region offers stunning scenery throughout the year, but August is particularly beautiful when the heather is in vibrant bloom, contrasting with the green sessile oaks. However, the rugged terrain means weather can change quickly. Spring and autumn generally offer pleasant temperatures and fewer crowds, while summer provides longer daylight hours. Always check local weather forecasts before heading out.
Llyn Cwm Bychan is known for its remote ambiance, with a narrow, winding road leading to the valley head. Public transport options directly to the lake are limited. It's generally more accessible by car, though some routes, like those starting from Llanbedr or Harlech, might be reachable via local bus services or train stations in nearby towns. Planning your journey in advance is recommended.
Due to the remote nature of Llyn Cwm Bychan, parking can be limited, often found in small lay-bys or designated areas near trailheads. For routes starting from towns like Harlech or Llanbedr, there may be more established parking facilities. Always park responsibly, ensuring you don't block access for residents or emergency services, especially on the narrow roads leading into the cwm.
Yes, some routes offer the convenience of passing by local establishments. The Afon Artro Riverside Path – Victoria Inn loop from Llanbedr, for instance, is named after the Victoria Inn, suggesting it's a good option for a post-ride refreshment or meal in Llanbedr.


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