4.5
(1526)
12,866
hikers
29
hikes
Waterfall hiking trails around Tanygrisiau Reservoir traverse a landscape shaped by slate mining heritage and the natural flow of water. The region features a mix of rugged hills, deep valleys, and the reservoir itself, providing varied terrain for hikers. Waterfalls are a prominent feature, often found along river courses that cut through the mountainous topography. The area's geology contributes to the formation of these cascades, creating distinct natural attractions.
Last updated: May 11, 2026
3.0
(1)
9
hikers
9.11km
02:38
230m
230m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
10
hikers
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

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5.0
(1)
7
hikers
11.5km
03:38
440m
440m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
9
hikers
10.1km
02:55
260m
260m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.4
(9)
40
hikers
13.0km
03:47
330m
330m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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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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Can be a little dark here and muddy after heavy rain
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Pengwern Country House is a beautiful 4 star Bed and Breakfast, set within two acres of wild woods, overlooking the beautiful Lledr Valley, 1 mile from the bustling picturesque village of Betws-y-Coed, the 'Gateway' to the Snowdonia National Park. Ideally situated to explore Snowdonia and North Wales. Just a short walk from Pengwern, you will find Conwy Falls and Fairy Glen. Pengwern has a relaxed county house atmosphere, is traditional but upbeat, with log fires, slate floor, a large sitting room with pictures reflecting its artistic past.
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A large reservoir, and a part of the Ffestiniog power station.
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The Cynfal Falls rush down this glacial gorge, filling the air with sound and spray. Find them near to the village of Llan Ffestiniog.
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You can drive almost directly to the waterfall by car. The car park is a popular starting point for hikes, even higher up.
2
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Quite a bit of main road walking in the latter half
1
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One of Snowdonia's great waterfalls, Rhaeadr y Cwm is a series of impressive cascades. The several falls amount to a total of 350 feet (107 m). A trail runs to the north of this spectacle, while there's nearby parking on the B4391 road to Llan Ffestiniog.
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There are nearly 30 distinct waterfall hiking trails around Tanygrisiau Reservoir, catering to various skill levels from easy strolls to challenging full-day hikes.
Yes, there are 8 easy waterfall hikes in the area. These routes typically feature gentler terrain and shorter distances, perfect for those new to hiking or looking for a relaxed experience. While specific easy routes aren't highlighted here, you can find them by filtering for 'easy' difficulty on komoot.
The trails offer a blend of natural beauty and industrial heritage. You'll encounter rugged hills, deep valleys, the reservoir itself, and of course, the prominent waterfalls. Many routes provide expansive views of the surrounding landscape, including glimpses of the historic slate mining areas.
Yes, many of the trails are designed as loops, allowing you to start and end at the same point. An example is the Hiking loop from Blaenau Ffestiniog, a moderate 9.1 km route that offers diverse scenery.
The trails around Tanygrisiau Reservoir are highly regarded by the komoot community, with an average rating of 4.5 stars from over 1,400 reviews. Hikers often praise the varied terrain, the stunning waterfalls, and the unique blend of natural beauty with the region's rich industrial history.
Yes, some routes incorporate sections of the historic Ffestiniog Railway Trail. For instance, the Ffestiniog Railway Trail – Cwmorthin Falls loop from Llan Ffestiniog is a moderate 11.5 km trail that combines railway paths with natural waterfalls.
Absolutely. Cynfal Falls (Rhaeadr Cynfal) is a notable feature in the region. A challenging option to experience these falls is the View of Blaenau Ffestiniog – Cynfal Falls (Rhaeadr Cynfal) loop from Blaenau Ffestiniog, a difficult 23.9 km path with significant elevation gain.
The majority of waterfall trails around Tanygrisiau Reservoir are moderate, with 14 such routes available. These trails offer a good balance of challenge and accessibility. An example is the Coed Tŷ-coch Stream – Ffestiniog Railway Trail loop from Llan Ffestiniog, a 10 km moderate hike.
Given the rugged terrain and potential for wet conditions near waterfalls, it's advisable to wear sturdy, waterproof hiking boots with good grip. Layered clothing is recommended to adapt to changing weather, and a waterproof jacket is always a good idea.
Yes, for experienced hikers seeking a challenge, there are 7 difficult routes. These trails often feature significant elevation changes and longer distances. The View of Blaenau Ffestiniog – Cynfal Falls (Rhaeadr Cynfal) loop from Blaenau Ffestiniog is a prime example, covering nearly 24 km.
The waterfalls are often at their most impressive after periods of rain, typically in autumn or spring, when water levels are higher. However, the trails are accessible year-round, with each season offering a different perspective on the landscape.
Yes, several routes begin from Llan Ffestiniog, offering convenient access to the trails. The Pengwern Country House – Cynfal Falls (Rhaeadr Cynfal) loop from Llan Ffestiniog is a moderate 13 km loop starting from there.


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