3.6
(30)
148
riders
10
rides
Mountain biking around Tanygrisiau Reservoir offers diverse terrain within the Snowdonia National Park, characterized by the surrounding Moelwyn mountains. The area features an unfettered wilderness of gravel tracks, valleys, and forests, alongside a rich industrial heritage of slate quarries. The landscape provides varied elevation changes, from reservoir-side paths to more challenging mountain ascents.
Last updated: July 8, 2026
1.0
(1)
4
riders
40.1km
03:52
1,090m
1,090m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
5.0
(1)
5
riders
49.4km
03:21
770m
770m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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21
riders
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
4.0
(1)
1
riders
32.1km
02:28
540m
540m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.7
(23)
77
riders
14.0km
00:59
160m
160m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
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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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You'll probably be too gassed to look out for it, about 2/3rds the way up to the top of Cwm Penmachno from Lan Ffestiniog, so a good indicator of how far you've come.
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Nice techy trails , but some of the board walks are broken , work is being done to fix them 😀
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sadly some of the board walks are broken and the trails are closed , there are diversions in place .
1
0
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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0
There are 10 mountain bike trails around Tanygrisiau Reservoir listed on komoot, offering a variety of experiences within the Snowdonia National Park.
The trails around Tanygrisiau Reservoir feature diverse terrain, including gravel tracks, slate quarry landscapes, and forest paths. You'll find options ranging from moderate loops to more difficult climbs. While there are no easy trails listed, 7 are rated moderate and 3 are difficult, providing challenges for various skill levels.
Yes, several routes are designed as loops. For example, the Penmachno Trails – Dolen Machno Fire Road Climb loop from Blaenau Ffestiniog is a challenging 40.1 km route, and the Cynfal Falls – Trawsfynydd Trig Point loop from Blaenau Ffestiniog offers a moderate 49.4 km ride exploring the wider region.
The area is rich in natural beauty and industrial heritage. You can expect breathtaking views of the Moelwyn mountains and the reservoir itself. The Cynfal Falls – Trawsfynydd Trig Point loop from Blaenau Ffestiniog passes natural features like Cynfal Falls, and the View of Llyn Trawsfynydd – Llyn Trawsfynydd loop from Blaenau Ffestiniog offers expansive views of Llyn Trawsfynydd. The Ffestiniog Railway, a historic narrow-gauge line, also has a station at Tanygrisiau.
While komoot lists 7 moderate trails, there are no trails specifically rated as 'easy' directly around Tanygrisiau Reservoir. However, the broader Snowdonia area is known for trails suitable for all skill levels. For dedicated beginner-friendly options, the nearby Antur Stiniog offers trails graded from green to black. The Llyn Trawsfyndd loop is a moderate 14 km route with less elevation gain, which might be suitable for families with some biking experience.
While the region is generally dog-friendly for outdoor activities, and circular strolls around the reservoir are popular for dogs to paddle, specific regulations for mountain biking with dogs can vary. It's always best to check local signage and ensure your dog is well-behaved and under control, especially on shared paths or near livestock.
The mountain bike routes in Tanygrisiau Reservoir are highly rated by the komoot community, with an average score of 3.5 stars from over 28 reviews. Users often praise the diverse terrain, the dramatic mountain scenery, and the opportunities for wilderness riding over gravel and through forests.
The nearby town of Blaenau Ffestiniog serves as a hub for the area and offers various amenities. You can find cafes, pubs, and accommodation options there to refuel and relax after your ride.
The historic Ffestiniog Railway has a station at Tanygrisiau, which can provide access to the area. However, for specific trailheads, it's advisable to check local bus services or consider driving, as public transport options might be limited for direct access to all starting points.
While specific parking locations are not detailed, the area around Tanygrisiau Reservoir and nearby Blaenau Ffestiniog generally offers parking facilities for visitors accessing outdoor activities. It's recommended to check maps or local information for designated parking areas near your chosen trailhead.
Yes, the nearby town of Blaenau Ffestiniog features dedicated mountain biking trails, and Antur Stiniog offers trails graded from beginner-friendly green to challenging black, providing a comprehensive mountain biking experience.


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