4.3
(195)
3,945
riders
26
rides
Mountain bike trails around Llyn Trawsfynydd offer diverse terrain within Eryri (Snowdonia) National Park, centered around a large man-made reservoir. The region features a mix of tranquil lake shores, rugged mountainous sections, and varied landscapes. Riders can expect gravel paths and country roads, with some routes incorporating challenging hilly sections.
Last updated: June 24, 2026
4.7
(23)
77
riders
14.0km
00:59
160m
160m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
6
riders
17.4km
01:23
250m
250m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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4.0
(1)
12
riders
31.0km
02:27
460m
460m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
5.0
(1)
3
riders
19.2km
01:36
370m
370m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.0
(1)
1
riders
32.1km
02:28
540m
540m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Prysor Cafe now open most days, nice seating outside overlooking llyn.
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perfect after a ride from Machynlleth "Canolfan Prysor Centre" with all the usual cafe favourites, good food and friendly staff.
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Just sublime when sunny, and even if not, the kind of narrow lane where you can ride along nice and relaxed.
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Cwmorthin quarry was a slate quarry west of the village of Tanygrisiau, north Wales. Quarrying on the site started in 1810. In 1860 it was connected to the Ffestiniog Railway. In 1900 it was acquired by the nearby Oakeley quarry and the two were connected underground. In 1970 it closed along with Oakeley. There was small-scale working in the 1980s and 1990s, and the mine finally closed in 1997.
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There are 26 mountain bike trails around Llyn Trawsfynydd. These include 8 easy routes, 14 moderate routes, and 4 difficult routes, offering options for various skill levels.
Yes, Llyn Trawsfynydd offers 8 easy mountain bike trails, many of which are circular routes utilizing gravel paths and country roads. An accessible option is View of Llyn Trawsfynydd – Llyn Trawsfynydd loop from Trawsfynydd, an easy 17.5 km path with picturesque views.
The terrain around Llyn Trawsfynydd is diverse, ranging from tranquil lake shores to rugged mountainous sections. You'll encounter gravel paths and country roads, with some routes featuring challenging hilly sections. The area is part of Eryri (Snowdonia) National Park, so expect varied landscapes.
Yes, circular routes are a highlight of mountain biking around Llyn Trawsfynydd. A popular option is the Llyn Trawsfyndd loop — Eryri (Snowdonia) National Park, a 14.0 km moderate trail that offers scenic views around the reservoir.
For experienced riders seeking a challenge, routes like View of Llyn Trawsfynydd – Serpent's Tail Trail loop from Maentwrog offer longer distances (31.0 km) and greater elevation gains, leading through varied and often hilly terrain. There are 4 difficult routes in total for advanced riders.
While mountain biking, you'll be surrounded by the breathtaking landscapes of Eryri (Snowdonia) National Park, including majestic mountains and forests. Key landmarks include the vast Llyn Trawsfynydd reservoir itself, the historic Trawsfynydd Nuclear Power Station, and the Maentwrog Dam.
While specific parking locations are not detailed in the route descriptions, Llyn Trawsfynydd is a popular outdoor destination within Eryri (Snowdonia) National Park. It is advisable to check local signage or official park websites for designated parking areas near trailheads, especially in villages like Trawsfynydd or Maentwrog.
The duration varies significantly by trail and rider pace. For example, the moderate Llyn Trawsfyndd loop (14.0 km) typically takes about 1 hour, while the longer Serpent's Tail Trail loop (31.0 km) can take around 2 hours 27 minutes.
The mountain bike trails around Llyn Trawsfynydd are highly rated by the komoot community, with an average score of 4.3 stars from over 180 reviews. Riders often praise the scenic views around the reservoir, the varied terrain, and the options available for different ability levels.
The best time to visit Llyn Trawsfynydd for mountain biking is generally during the spring, summer, and early autumn months (April to October) when the weather is milder and trails are less likely to be wet or icy. However, conditions can vary, so checking local weather forecasts is always recommended.
Yes, Llyn Trawsfynydd is part of the 'Snowdonia One big Adventure project,' which includes renowned mountain bike centers like Antur Stiniog and Coed y Brenin. This proximity means you have access to a broader spectrum of trails and facilities for extended mountain biking adventures in the region.
While many outdoor areas in Eryri (Snowdonia) National Park are dog-friendly, specific rules for mountain bike trails can vary. It's best to keep dogs on a lead, especially near livestock or in sensitive wildlife areas, and always clean up after them. Check local signage for any specific restrictions on individual trails.
The Llyn Trawsfynydd area, being within Eryri (Snowdonia) National Park, offers various amenities. You can find cafes, pubs, and accommodation options in nearby villages such as Trawsfynydd, Maentwrog, and Blaenau Ffestiniog, providing convenient stops for refreshments and overnight stays.


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