5.0
(17)
1,252
riders
47
rides
Road cycling around Llyn Trawsfynydd offers varied terrain within Snowdonia National Park, Gwynedd. The region features a large artificial reservoir, surrounded by a dramatic backdrop of mountains like the Rhinogs and Cadair Idris, alongside woodlands and cycleways. Paved surfaces and dedicated cycle paths cater to road cyclists, with some sections incorporating country roads. The landscape provides both accessible routes and more challenging options with significant elevation gains.
Last updated: May 11, 2026
5.0
(1)
74
riders
64.9km
03:32
1,020m
1,020m
Prepare for a demanding road cycling adventure on this difficult 40.3-mile (64.9 km) loop from Trawsfynydd. You will tackle significant climbs, gaining 3342 feet (1019 metres) in elevation over approximately…
25
riders
57.9km
03:14
920m
920m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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26
riders
32.5km
01:52
680m
680m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
14
riders
87.7km
04:56
1,620m
1,620m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
15
riders
37.5km
02:15
850m
850m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
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The climb up to Bwlch-y-Groes from Llanymawddwy is a tough one. It is about 3.4 km long and has about 387 m of vertical ascent to get to the gap at 546 m above sea level. You will have an average gradient of 11.3% to grind away at, but you will be rewarded with fantastic views north and south.
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Prysor Cafe now open most days, nice seating outside overlooking llyn.
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Car park gets full up top so park sensibly park close to next car gives more space for others. Don’t park in front of gate as this is used by farmer Go Below and mountain/cave rescue. More parking available at bottom of hill.
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Small train station in the mountains - slate was once mined here - now a tourist attraction.
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It's a good climb, it's hard but it's beautiful
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A 10/10 piece of road starting just after Dolhendre caravan park. The roads are smooth and winding, with some steep but varied gradients. Keep an eye out for the waterfalls and enjoy the descent heading towards Trawsfynydd: just watch out for the gates!
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There are over 45 road cycling routes available around Llyn Trawsfynydd, catering to various skill levels. You'll find a good mix of easy, moderate, and difficult options to explore the scenic landscapes of Snowdonia National Park.
The terrain around Llyn Trawsfynydd is quite varied. While some sections feature dedicated cycleways and paved surfaces ideal for road cycling, you can also expect country roads and some routes with significant elevation gains. There are 4 easy routes, 26 moderate routes, and 17 difficult routes, ensuring options for all abilities.
Yes, the region is rich in both natural beauty and historical sites. You can cycle past the impressive Maentwrog Dam, an engineering feat from the 1920s, or catch glimpses of the Trawsfynydd Nuclear Power Station, a significant landmark. The area also boasts dramatic mountain backdrops, woodlands, and the expansive Llyn Trawsfynydd itself.
Yes, the area offers dedicated cycleways and footpaths that are suitable for families. These often provide traffic-free sections and impressive views, making for a safe and enjoyable experience for all ages. The new cycle loop around the lake, for instance, is a great option.
Absolutely. Many of the routes around Llyn Trawsfynydd are designed as loops, allowing you to start and finish in the same location. For example, the popular route A loop of three llyns from Trawsfynydd offers a comprehensive circular experience, navigating varied landscapes and multiple lakes.
Elevation gains vary significantly depending on the route's difficulty. For instance, a challenging route like Bwlch y Groes – Bwlch yr Oerddrws loop from Maentwrog can feature over 1,600 meters of ascent, while moderate routes like Stwlan Dam – Pengwern Country House loop from Maentwrog typically have around 680 meters of elevation gain.
The spring and summer months generally offer the most favorable weather conditions for road cycling around Llyn Trawsfynydd, with milder temperatures and longer daylight hours. However, the stunning natural beauty of Snowdonia National Park makes it a rewarding destination throughout the year, with autumn offering vibrant foliage.
Yes, the area is becoming increasingly cyclist-friendly. A new visitor center with a café has been established, enhancing the cycling experience. You'll also find amenities in nearby villages, offering opportunities for refreshments and breaks during your ride.
Parking facilities are available in and around the Llyn Trawsfynydd area, particularly near the visitor center and trailheads. Specific parking information for individual routes can often be found in the route descriptions on komoot.
Many routes provide breathtaking views. The View of Bala Lake – Bala Town Centre loop from Trawsfynydd offers expansive vistas towards Bala Lake. Generally, routes that encircle Llyn Trawsfynydd or climb into the surrounding mountains, such as those with views of the Rhinogs and Cadair Idris, will provide stunning panoramic scenery.
Experienced cyclists seeking a challenge will find several difficult routes. The Bwlch y Groes – Bwlch yr Oerddrws loop from Maentwrog is a demanding option with significant elevation. Another popular choice is the A loop of three llyns from Trawsfynydd, which covers over 64 km and includes substantial climbing.
The area is highly rated by the komoot community, with an average score of 4.9 stars. Reviewers often praise the dramatic mountain backdrops, the variety of routes catering to different abilities, and the stunning lake views that define the road cycling experience around Llyn Trawsfynydd.


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