Tanygrisiau Reservoir Loop Trail
Tanygrisiau Reservoir Loop Trail
4.1
(25)
52
hikers
01:20
4.98km
50m
Hiking
Hike the easy 3.1-mile Tanygrisiau reservoir loop in Snowdonia National Park, offering views of the reservoir and industrial heritage.
Last updated: February 26, 2026
Tips
Your route passes through a protected area
Please check local regulations for:
Waypoints
Start point
Train Station
Get Directions
183 m
Highlight • Cafe
Translated by Google •
Tip by
1.15 km
Highlight • Structure
Tip by
1.79 km
Highlight • Historical Site
Tip by
4.98 km
End point
Train Station
Way Types & Surfaces
Way Types
2.09 km
1.35 km
728 m
533 m
152 m
< 100 m
Surfaces
3.10 km
796 m
617 m
441 m
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Elevation
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Weather
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Wednesday 20 May
15°C
9°C
44 %
Additional weather tips
Max wind speed: 31.0 km/h
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This route was planned by komoot.
The Tanygrisiau reservoir loop is approximately 5.0 km (3.1 miles) long and typically takes around 1 hour and 20 minutes to complete at a moderate pace. This can vary depending on your speed and how often you stop to enjoy the views.
Yes, this loop is classified as an 'easy hike' and is suitable for all skill levels and fitness levels. Its accessible paths and relatively flat terrain make it a great option for beginners and families with children.
The path around the reservoir consists of a mix of slate gravel and grass. While generally flat, some sections can be slightly wet, and you might encounter a couple of stream crossings that require stepping stones. There are also two stiles on the route, one of which has a dog-friendly space. A short portion runs alongside a quiet public highway.
Free parking is available near Tanygrisiau Station, which serves as a convenient starting point for the loop.
Yes, the trail is suitable for dog walkers. Dogs can enjoy paddling in the reservoir, and there's a dog-friendly space at one of the stiles. Please ensure your dog is kept under control, especially near livestock or other hikers.
You'll enjoy attractive views of the Llyn Ystradau (Tanygrisiau Reservoir) and the surrounding Moelwyn mountains. The area is rich in industrial heritage, with remnants of the slate-quarrying industry, disused quarries, and the Ffestiniog Power Station complex. You can also see the Old Railway Track at Llyn Tanygrisiau.
The Tanygrisiau reservoir loop can be enjoyed year-round. However, for the most pleasant conditions, spring and autumn offer mild temperatures and beautiful scenery. Summer is also popular, but be prepared for more visitors. Winter hikes are possible but may involve colder, wetter conditions.
Yes, there is a Lakeside Café nearby that is dog-friendly. The starting point is also accessible by public transport, and the village of Tanygrisiau offers some amenities.
Yes, sections of this route overlap with other official trails. Approximately 22% of the loop follows the Snowdonia Slate Trail, 10% is part of the Cambrian Way, and 9% coincides with the LLyn Stwlan Mine Railway Walk.
No, there are no general entrance fees or permits required to access the Tanygrisiau reservoir loop or other public footpaths within Parc Cenedlaethol Eryri | Snowdonia National Park. However, always respect local signage and private land.
The Tanygrisiau Reservoir is part of the Ffestiniog Power Station complex, a pumped-storage system. This means the water levels can vary, which might influence the exact route and conditions of the path around the reservoir at different times.