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Llanwrthwl

Caban-coch Reservoir loop from Elan Valley Visitor Center to Llanerchi Wood

Routes
Hiking trails & Routes
Powys
Llanwrthwl

Caban-coch Reservoir loop from Elan Valley Visitor Center to Llanerchi Wood

Hard

4.7

(23)

86

hikers

Caban-coch Reservoir loop from Elan Valley Visitor Center to Llanerchi Wood

05:09

17.8km

440m

Hiking

Hike the difficult 11.0-mile Caban-coch Reservoir loop in Elan Valley, featuring dam views, woodlands, and reservoir reflections.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

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1

3.05 km

Llanerchi Woods

Highlight • Forest

Fantastic panoramic views over the reservoirs.

Tip by

2

7.35 km

Claerwen Dam

Highlight • Monument

The Claerwen dam took 6 years ti complete and was finished in 1952.
It was given a late Victorian finsh so that it blended in with the earlier dams in the valley.

It's a big one - almost twice the size of the other dams in the Elan valley and the Claerwen reservoir is almost the size of all the other reservoirs in the Elan Valley system combined.

Tip by

3

9.74 km

TransCambrian Way Sunken Road

Highlight • Viewpoint

Forming a very wet part of the TransCambrian Way, you will want to ensure your footwear waterproofing is up to spec before venturing along here.

Tip by

4

16.1 km

Nant-y-Gro Dam Ruins

Highlight • Viewpoint

Destroyed during the famous Dambusters experiments in World War II that led to the creation of the ‘bouncing bomb’, the remains of the Nant-y-Gro dam are well worth the walk. There are also great views of the Caban Coch Reservoir.

Tip by

5

17.4 km

Caban Coch Dam

Highlight • Natural Monument

The lowest of the dams in the sequence of four built in the valley of the Elan River is Caban Coch Dam. It is the simplest and most functional in appearance of all the dams, resembling a natural waterfall when the reservoir is full and the dam is in full spate with water pouring over the dam wall. Simply stunning!

Tip by

B

17.8 km

End point

Parking

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Way Types & Surfaces

Way Types

13.5 km

1.84 km

1.82 km

614 m

Surfaces

11.2 km

3.99 km

2.25 km

183 m

< 100 m

< 100 m

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Elevation

Elevation

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

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Weather

Powered by Foreca

Thursday 7 May

16°C

5°C

41 %

Additional weather tips

Max wind speed: 17.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park to start the Caban-coch Reservoir loop?

The best place to start this loop is from the Elan Valley Visitor Centre. It offers ample parking facilities, making it a convenient trailhead for your hike.

Is the Caban-coch Reservoir loop suitable for beginners?

This specific loop is rated as difficult due to its distance and elevation gain. While some sections have gentle gradients, be prepared for varied terrain and some short, steep climbs. It requires a good level of fitness, so it might be challenging for absolute beginners.

What kind of terrain can I expect on this hike?

The trail features a mix of surfaces, including reservoir-side paths, woodland trails, and some paved or tarmac areas, especially across the dams. You'll encounter gravel and asphalt sections, but be prepared for potentially boggy, muddy, and wet areas, particularly after rain.

What notable sights will I see along the route?

You'll encounter several impressive features. Highlights include the iconic Caban Coch Dam, which is spectacular when overflowing, and the serene Llanerchi Woods. You'll also pass the Claerwen Dam, the TransCambrian Way Sunken Road, and the historic Nant-y-Gro Dam Ruins.

Does this trail intersect with other well-known paths?

Yes, the route incorporates sections of several other paths. You'll find yourself on parts of the Trans Cambrian Way, the Elan Valley Trail, and the Nantgwyllt Blue Flow Trail.

Is the Caban-coch Reservoir loop dog-friendly?

Yes, the Elan Valley generally welcomes dogs. However, please keep your dog on a leash, especially around livestock, wildlife, and other hikers, and always clean up after them.

What is the best time of year to hike this loop?

The Elan Valley is beautiful year-round, but spring and autumn offer particularly stunning scenery with vibrant colors. Summer provides longer daylight hours, while winter can be dramatic but requires appropriate gear for potentially cold and wet conditions. Be aware that some sections can be boggy after heavy rain, regardless of the season.

Are there any permits or entrance fees required for hiking in the Elan Valley?

No, there are no specific permits or entrance fees required to hike this loop or access the Elan Valley Estate. It is freely accessible to the public.

What wildlife might I spot on the trail?

The Elan Valley Woodlands are a rich habitat. Keep an eye out for various bird species such as Dippers, Red Starts, and Flycatchers. The valley's peaceful environment also supports other local wildlife.

Are there facilities like cafes or toilets near the trailhead?

Yes, the Elan Valley Visitor Centre, where the loop starts, offers excellent facilities. You'll find toilets, a cafe for refreshments, and information about the area, making it a convenient starting and ending point.

What should I bring for this hike?

Given the trail's length and varied terrain, it's advisable to bring appropriate hiking boots, waterproof clothing, sufficient water and snacks, and a map or GPS device. Some sections can be exposed, so sun protection is also recommended on sunny days.

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