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South Wales
Crickhowell

Cambrian Way and Waun Fach Loop

Hard

4.8

(20)

155

hikers

Cambrian Way and Waun Fach Loop

09:49

32.5km

1,010m

Hiking

Hike the difficult 20.2-mile Cambrian Way and Waun Fach Loop in Brecon Beacons National Park, offering expansive views and challenging ascen

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Brecon Beacons National Park

Waypoints

A

Start point

Parking

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1

256 m

Crickhowell Castle ruins

Highlight • Historical Site

Crickhowell Castle, also known as Alisby's castle, dominates the views from the delightful market town. The now Grade I-listed ruin began life as a motte and bailey castle in the …

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2

735 m

River Usk

Highlight • River

The River Usk rises on the northern slopes of the Black Mountain (y Mynydd Du), Wales, in the westernmost part of the Brecon Beacons National Park. Initially forming the boundary …

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3

4.30 km

The flat and slightly sloping summit of Table Mountain looms over Crickhowell. At 1,480 feet (451 m) high, its flat top — at a slightly tipsy-looking angle — is an …

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4

6.35 km

Pen Cerrig-calch summit

Highlight • Viewpoint

This remote and little visited summit is perfect for explorers keen to escape the crowds. Standing at 2,300 feet (701 m), the summit boasts spectacular views over the River Usk valley, Crickhowell, and further afield.

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5

8.75 km

Pen Allt-mawr

Highlight • Viewpoint

If you do the Waun Fach Loop you can take in Pen Cerrig Calch and six other Nuttalls and it is a glorious 25km high level route with nearly 1,000m of height gain. For route details click here: komoot.com/tour/280372758

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6

10.6 km

Mary's Stones (Macnamara Boundary Stones)

Highlight • Historical Site

The story of the Macnamara boundary stones near the summit of Pen Twyn Glass mountain is a long but interesting one. Further details can be found here: ewyaslacy.org.uk/-/Mary-s-Stones-investigating-the-Mrs-Macnamara-Boundary-Stones-in-the-Black-Mountains/1820s/nw_lty_1002

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7

14.1 km

Pen Trumau

Highlight • Summit

This is a Beautilful view

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8

14.3 km

Ridge to Waun Fach

Highlight • Trail

If you do the Waun Fach Loop you can take in Pen Cerrig Calch and six other Nuttalls and it is a glorious 25km high level route with nearly 1,000m of height gain. For route details click here: komoot.com/tour/280372758

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9

15.8 km

Waun Fach summit

Highlight • Summit

A silent giant, Waun Fach is the highest point in South Wales' Black Mountains. Its gradual slopes and the flat nature of its summit mean that it can hardly be …

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B

32.5 km

End point

Parking

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Way Types & Surfaces

Way Types

15.0 km

7.62 km

4.69 km

3.51 km

928 m

415 m

344 m

Surfaces

16.1 km

5.90 km

5.02 km

4.19 km

1.21 km

183 m

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Elevation

Elevation

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

Highest point (810 m)

Lowest point (70 m)

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Weather

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Saturday 9 May

12°C

4°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How challenging is the Cambrian Way and Waun Fach Loop?

This is considered a difficult hike, requiring good fitness due to significant uphill climbs. While paths are generally well-worn, expect very steep ascents and undulating terrain. Some sections can be boggy, especially after rain.

How long does it typically take to complete this loop?

The full loop is a substantial undertaking. Given its distance of over 32 km and significant elevation gain, it typically takes around 9-10 hours to complete, depending on your pace and breaks.

What are the main highlights and viewpoints along the trail?

The route offers spectacular panoramic views and notable landmarks. You'll pass by the historic Crickhowell Castle ruins, the scenic River Usk, and the summit of Crug Hywel (Table Mountain). Key viewpoints include Pen Cerrig-calch summit and Pen Allt-mawr. A major highlight is the ridge to Waun Fach, leading to the Waun Fach summit, the highest peak in the Black Mountains, offering commanding views over the Brecon Beacons and Wye Valley.

Where can I park for the Cambrian Way and Waun Fach Loop?

The tour starts near Crickhowell, which offers various parking options. It's advisable to check local parking availability and regulations in Crickhowell before your visit, especially during peak season.

Is public transport available to the trailhead?

Crickhowell is served by local bus routes, which can connect you to larger towns with train stations. Check local bus schedules for services to Crickhowell to plan your journey.

When is the best time of year to hike this route?

The best time to hike is generally from late spring to early autumn (May to September) when the weather is more stable and the days are longer. Winter conditions can be very challenging, with snow, ice, and strong winds, making the route significantly more difficult and potentially dangerous.

Is the Cambrian Way and Waun Fach Loop dog-friendly?

Dogs are generally welcome on this trail, but they must be kept on a leash, especially when passing through farmland or near livestock. This is crucial for the safety of your dog and local wildlife, particularly ground-nesting birds and wild ponies.

Are there any permits or entrance fees required for this hike?

No, there are no specific permits or entrance fees required to hike the Cambrian Way and Waun Fach Loop within Bannau Brycheiniog (Brecon Beacons) National Park. However, please respect the National Park's regulations, such as keeping dogs on leads and taking all litter home.

What kind of wildlife might I encounter on the trail?

You might spot wild ponies grazing on the moorland. The area is also home to various bird species, including skylarks, golden plovers, and majestic red kites soaring overhead, adding to the sense of wilderness.

Does the trail intersect with other well-known paths?

Yes, the route incorporates significant sections of the Cambrian Way, which makes up over 50% of the trail. It also crosses parts of the Beacons Way and the distinctive Dragon's Back ridge.

What should I bring for a hike on this trail?

Given the trail's difficulty and varied terrain, proper walking boots are essential. Bring plenty of water, especially as there are limited natural water sources on the higher sections. Layers of clothing, waterproofs, navigation tools, and snacks are also highly recommended.

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Trail Reviews

Alex Foxfield
April 1, 2022, Black Mountains Traverse #thismytime

My time is grabbing spring with both hands and taking on an entire range in a day, solo. My time is going fast and light, on my own terms and at my own pace… An epic day traversing the main spine of the Black Mountains range in the Brecon Beacons National Park. I’d been eyeing up this huge horseshoe route for a while and with new Keen ( @KEEN Footwear ) NXIS hiking sneakers promising a fast and light approach, I thought #thisismytime and went for it. Starting and finishing in Crickhowell, this is a long route, totalling 19 miles and over 1,000 metres of elevation. Comfort on the trail was key and was provided by the NXIS. With my heels held firmly in place and loads of space for my toes, there was no hint of my feet sliding during descents, no bunched up toes and a cosy fit the whole way around. Great returning to a fast and light hiking approach after starting the month winter mountaineering in Scotland. While winter is my favourite, there’s something so liberating about going fast and light, running the downhills and striding purposefully through a big route like this.

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