Mountain (Hewitt), Nuttall & OS Trig Point Icon

Pen Allt-mawr
719m (2362ft)

The Black Mountains, The Brecon Beacons, Powys, Wales

The summit of Pen Allt-mawr is marked by an Ordnance Survey Trig Point.


Record Pen Allt-mawr as Bagged, Climbed & Conquered


Welsh Mountain Icon

Welsh Mountain
62nd highest in Wales,
150th in England & Wales

Welsh Nuttall Icon

Welsh Nuttall
78th highest in Wales,
186th in England & Wales

Welsh Trig Point Icon


Welsh Trig Point (Pillar)

You can find Pen Allt-mawr & all the walks that climb it on these unique free-to-access Interactive Walk Planning Maps: (click/TAP to select)

The Brecon Beacons National Park


1:25,000 scale OS Explorer Map (the ones with orange/yellow covers):

OL13 Brecon Beacons National Park - Eastern area


1:50,000 scale OS Landranger Map (the ones with pink/magenta covers):

161 Abergavenny & The Black Mountains


See Pen Allt-mawr and the surrounding tops on our free-to-access 'Google Style' Peak Bagging Maps:

See Pen Allt-mawr and the surrounding tops on our downloadable PDF Peak Bagging Map:


Not familiar with Pen Allt-mawr?

See the location of Pen Allt-mawr and all 3 walks that climb it on an interactive Google Map


You can walk to the top of Pen Allt-mawr by using any of these 3 easy‑to‑follow route maps:
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Walk po108 Pen Cerrig-calch and Pen Allt-mawr from Neuadd-fawr

Fine views in all directions

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Vital Statistics:

Length: 6.25ml (10km)
Ascent:1,879ft (573m)
Time:4.25hrs
Grade:Walk Grade 5 Icon (Moderate)
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Walk po135 Pen Cerrig-calch and Mynydd Llysiau from Nuadd-fawr

Fine views in all directions

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Vital Statistics:

Length: 11ml (17.5km)
Ascent:2,430ft (741m)
Time:6½ hrs
Grade:Walk Grade 6 Icon (Moderate)
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Walk po153 Pen Cerrig-calch and Waun Fach from Nuadd-fawr

Fine views in all directions

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Vital Statistics:

Length: 13.5ml (21.5km)
Ascent:3,175ft (968m)
Time:8 hrs
Grade:Walk Grade 8 Icon (Hard)

Other walkers who hiked, climbed, bagged and summited Pen Allt-mawr Fellow go4awalkers who have already walked, climbed, summited & bagged Pen Allt-mawr

Paul Roddam walked up Pen Allt-mawr on April 14th, 2024 [from/via/route] Hairpin up from LLanbedr [with] solo [weather] Spring sun

Jonathan Morris climbed Pen Allt-mawr on February 17th, 2024 [from/via/route] Llanthony Priory [with] Mi Madre [weather] Wet & Windy

Donovan Suddell bagged Pen Allt-mawr on May 8th, 2023 [from/via/route] Crickhowell [with] Wife [weather] warm but cloudy most of the day

Mark Davidson hiked Pen Allt-mawr on April 10th, 2005 [from/via/route] Walk po153 Pen Cerrig-calch & Waun Fach from Nuadd-fawr [with] Theresa [weather] Dry but rather cloudy - tops were clear though

Sion Britton summited Pen Allt-mawr on April 11th, 2021 [from/via/route] O O Llanbedr. Horseshoe Route. [with] Solo [weather] Braf/ Cymylog

Mary Norris conquered Pen Allt-mawr on September 27th, 2020 [from/via/route] From Crickhowell via Table Mountain . [with] Betsie and WYWS [weather] Beautiful sunny day, really warm. - Beautiful clear views.

Simon Burgess scaled Pen Allt-mawr on August 23rd, 2020 [from/via/route] Pen Cerrig-Calch, Pen Allt Mawr, Pen Twyn Glas [with] Solo [weather] Everything in one day

Dale Tyler walked up Pen Allt-mawr on August 30th, 2017 [from/via/route] 2nd peak on the Waun Fach horseshoe from Cwmdu to Crickhowell [weather] Mostly glorious, two short sharp showers at the beginning of the walk-enough convince me to reproof my jacket! - 19 mile walk followed by a well deserved pint & meal in Crickhowell. Sticky toffee pudding, mmmmm!

Bleddyn Rhys climbed Pen Allt-mawr on June 18th, 2016 [from/via/route] Crug Howel

Glenn Radford bagged Pen Allt-mawr on October 29th, 2015 [from/via/route] walk po105 [with] William [weather] Mist Cloud low AM Clear windy PM

To add (or remove) your name and experiences on this page - Log On and edit your Personal Mountain Bagging Record

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Not familiar with Pen Allt-mawr?

See the location of Pen Allt-mawr and all 3 walks that climb it on an interactive Google Map



Send us your photographs and pictures on, of, or from Pen Allt-mawr

If you would like to add your walk photographs and pictures featuring views from, on or of Pen Allt-mawr to this page, please send them as email attachments (configured for any computer) along with your name to:



and we shall do our best to publish them.

(Guide Resolution = 300dpi. At least = 660pixels (wide) x 440 pixels (high).)

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Not familiar with Pen Allt-mawr?

See the location of Pen Allt-mawr and all 3 walks that climb it on an interactive Google Map





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