Premium Walk

Tanygrisiau Reservoir

Updated: July 20, 2025
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Walk Highlights

Nearest Town:
Blaenau Ffestiniog
Distance:
3.10 miles
Time:
1.50 hours
Difficulty:
Moderate
Terrain:

The terrain for a walk at Tanygrisiau Reservoir in Gwynedd includes some surfaced paths and access tracks (related to the power station), as well as gravel paths and some rougher, rockier sections, particularly if venturing slightly off the main perimeter path or onto higher ground. There are some gentle to moderate undulations. The area is very exposed to mountain weather, which can change rapidly and be severe. Sturdy footwear is highly recommended for this Gwynedd walk. Be prepared for wind and rain.

Facilities:
Cafe

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Dog-Centric Details

Poo Bins Available:
Yes
Secure/Fenced Area:
No
Dog Water Source:
Yes
Dog Notes:

The area around Tanygrisiau Reservoir in Gwynedd can be good for walking with dogs that are used to upland and sometimes rugged environments. However, sheep graze freely and extensively in many parts of Snowdonia, including the hillsides around Tanygrisiau, so dogs MUST be kept on leads or under very close and reliable control at all times to prevent worrying livestock. Be aware of steep drops near some paths and old quarry workings. Please clean up after your dog. The reservoir water is deep and cold; supervise dogs closely if they enter. This Gwynedd walk requires responsible dog ownership.

EV Charger Nearby:
No
Fuel Station Nearby:
No
Livestock Information:
Off-Leash Policy:
Full Off-Leash
Dog Traffic:
Moderate
Seasonal Advice:
Height Restriction:
No
Printable Version:
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About this Walk

Enjoy a scenic and atmospheric walk at Llyn Tanygrisiau Reservoir in Gwynedd, North Wales, a reservoir nestled amidst the dramatic mountain scenery of Snowdonia National Park. This walk offers stunning, often stark, views of the surrounding Moelwynion mountains, the legacy of the historic slate quar...

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