Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Login or Signup

Routes
Hiking trails & Routes
United Kingdom
Wales
North Wales
Gwynedd
Ffestiniog

Tanygrisiau Reservoir Loop Trail

Easy

4.1

(25)

52

hikers

Tanygrisiau Reservoir Loop Trail

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:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Train Station

Get Directions

1

183 m

Lakeside Café

Highlight • Cafe

A good place to stop for a break. We particularly enjoyed the lamb burger with mint sauce.
With a bit of luck (or knowledge of the timetable) you can also see the historic steam train steaming past.

Translated by Google •

Tip by

2

1.15 km

A large reservoir, and a part of the Ffestiniog power station.

Tip by

3

1.79 km

Old Railway Track at Llyn Tanygrisiau

Highlight • Historical Site

Quite a bit of main road walking in the latter half

Tip by

B

4.98 km

End point

Train Station

Loading

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

Sign up to see more specific route details

Sign up for free

Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Sign up to see more specific route details

Sign up for free

Weather

Powered by Foreca

Wednesday 20 May

15°C

9°C

44 %

Additional weather tips

Max wind speed: 31.0 km/h

to get more detailed weather forecasts along your route

This route was planned by komoot.

Save

Edit route

Download GPX

Move start point

Print

Share

Embed on a website

Report an Issue

Frequently Asked Questions

How long does it take to complete the Tanygrisiau reservoir loop?

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.

Is the Tanygrisiau reservoir loop suitable for beginners or families?

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.

What is the terrain like on the Tanygrisiau reservoir loop?

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.

Where can I park for the Tanygrisiau reservoir loop?

Free parking is available near Tanygrisiau Station, which serves as a convenient starting point for the loop.

Is the Tanygrisiau reservoir loop dog-friendly?

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.

What interesting features or landmarks will I see along the route?

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.

What is the best time of year to hike the Tanygrisiau reservoir loop?

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.

Are there any cafes or facilities near the Tanygrisiau reservoir loop?

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.

Does the Tanygrisiau reservoir loop connect with other trails?

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.

Do I need a permit or pay an entrance fee to hike in Snowdonia National Park?

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.

What should I know about the reservoir's water levels?

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.

Nearby routes

Moderate

4.9

8,863

Snowdon via Pyg and Miners' Track Loop

04:56h

12.3km

680m

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy