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South Wales

Monmouthshire

Crucorney

Twmpa & Hay Bluff loop from Llanthony Priory — Bannau Brycheiniog (Brecon Beacons) National Park

Routes

Hiking trails & Routes

South Wales

Monmouthshire

Crucorney

Twmpa & Hay Bluff loop from Llanthony Priory — Bannau Brycheiniog (Brecon Beacons) National Park

Hard

5.0

(6)

133

hikers

Twmpa & Hay Bluff loop from Llanthony Priory — Bannau Brycheiniog (Brecon Beacons) National Park

08:26

28.4km

790m

Hiking

Embark on a challenging Twmpa & Hay Bluff loop from Llanthony Priory, a difficult hike spanning 17.6 miles (28.4 km) with a significant 2589 feet (789 metres) of elevation gain, typically taking around 8 hours and 26 minutes to complete. You will traverse varied terrain, from steep ascents out of…

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Bannau Brycheiniog National Park

Waypoints

Start point

Parking

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5.64 km

Chwarel y Fan Summit

Highlight • Viewpoint

Chwarel y Fan is the high point of a long northwest-southeast ridge in the Black Mountains. Standing at 2,228 feet (679 m), the summit affords spellbinding panoramic views. Immediately below, you get a lovely view over Grwyne Fawr Reservoir.

Tip by

11.9 km

Rhos Dirion summit

Highlight • Natural Monument

Rhos Dirion is a summit in the Black Mountains. It is the highest point on the Rhos Dirion-Chwarel y Fan ridge and the summit is marked by a trig point. Rhos Dirion is a UK-listed Nuttall.

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14.2 km

Twmpa (Lord Hereford’s Knob)

Highlight • Viewpoint

Twmpa, or Lord Hereford's Knob, is a mountain in southeast Wales, forming a part of the great northwest scarp of the Black Mountains. It lies 1.86 miles (3 km) west …

Tip by

17.1 km

Hay Bluff

Highlight • Viewpoint

This is a beautiful area and is popular with hikers, paracenders, bikers and the general population at large. There is a narrow single track road, with ample passing places, that …

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19.3 km

Twyn Llech (Black Mountain) Summit

Highlight • Viewpoint

Twyn Llech (703m), also known as Black Mountain, is the only Marilyn to fall exactly on the Welsh–English border, straddling Brecknockshire (Powys) and Herefordshire.

The Black Mountain is the highest …

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28.0 km

Llanthony Priory Ruins

Highlight • Historical Site

Llanthony Priory is a partly ruined former Augustinian priory in the Black Mountains area of the Brecon Beacons National Park. As well as being a stunning place to visit it …

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28.4 km

End point

Parking

Way Types & Surfaces

Way Types

15.8 km

9.96 km

2.32 km

277 m

Surfaces

20.8 km

3.05 km

2.29 km

2.17 km

< 100 m

Elevation

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

Highest point (710 m)

Lowest point (220 m)

Weather

Saturday 11 July

29°C

15°C

0 %

Additional weather tips

Max wind speed: 27.0 km/h

to get more detailed weather forecasts along your route

Comments

August 28, 2021,The Eastern Mountain Black Mountains

In my experience, an August Bank Holiday in South Wales, never fails!

after completing all 23 Welsh Summits of the Beacons on the west of the national park, it only seemed right to come back and complete the Eastern side. The Black Mountains!

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This route was planned by komoot.

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Twmpa & Hay Bluff loop from Llanthony Priory — Bannau Brycheiniog (Brecon Beacons) National Park

Chwarel y Fan Summit

Rhos Dirion summit

Twmpa (Lord Hereford’s Knob)

Hay Bluff

Twyn Llech (Black Mountain) Summit

Llanthony Priory Ruins

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