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

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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

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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

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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

Melfyn Parry walked up Pen Allt-mawr on July 16th, 2024 [from/via/route] Followed go4awalk route PO153 - Pen Cerrig Calch & Waun Fach from Neuadd Fawr. Once on the ridge the walk is relatively easy, good paths. There are some areas that are quite boggy, so be prepared if following this route after lots of rain. The first peak was hard going, lots of tall bracken & bilberry bushes to fight your way through, I was so glad to reach the top of Pen Cerrig Calch. The final path from the cairn to the minor road leading back to the car park was also overgrown with bracken & the public footpath part was seriously neglected from a maintenance perspective, although the stiles looked almost new the path itself was overgrown with nettle, bramble & even more bracken making the last leg of the walk hard work. [with] On my own [weather] Sunny spells & generally dry. For a mid July walk it was quite cool at times. - Best to avoid this walk when the bracken is in season. If you have to walk in the summer months & especially after rain, waterproofs are a must as the grasses & bracken don't dry out at their base & you can get seriously wet even though you think it's a dry day.

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

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

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

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

Mary Norris scaled 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 walked up 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 climbed 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 bagged Pen Allt-mawr on June 18th, 2016 [from/via/route] Crug Howel

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

Alan Smith summited Pen Allt-mawr on July 2nd, 2015 [with] Barry

Christina Lander conquered Pen Allt-mawr on March 10th, 2015 [from/via/route] Pen Carrig-calch - Pen Allt-mawr - Pen Twyn Glas - Mynydd Llysiau - Pen Trumau - Waun Fach - Pen y Gadair Fawr - Pen Twyn Mawr [with] Dick [weather] Beautiful day, warm & sunny

Robert Taylor-Marriott scaled Pen Allt-mawr on October 17th, 2014 [from/via/route] Route 64: Pen Cerrig-calch, Pen Allt-mawr, Pen Twyn Glas, Mynydd Llysiau (PGP). [with] Vince Wetton and Robert Taylor-Marriott. [weather] Sunny, cloudy & windy. - Planned to complete 7 Mountains/hills & completed 4 only as Vince passed away at SO 20750 29716.

Tim Buckley walked up Pen Allt-mawr on September 28th, 2014 [from/via/route] po153 from Neuadd Fawr, just north of Llanbedr set off 8.30am arrived here are 10.37am [with] Solo walk [weather] 20 degrees, very clear views across the Brecon Beacons - Not many people on the hills but did come across the usual DoE group!

David Lane climbed Pen Allt-mawr on December 5th, 2009 [with] Kelly, Derek Saul (Kelly's Brother-in-law) Nathan Saul (Kelly's Nephew) and Alex Anderson (Kelly's Son-in-law).

Tom Norgate, Michael Rygol, John Cuthbert, Paul Booth, Trevor Williams, David Price, Keith Brockwell, Matthew Thomas and Richard Penney have all walked, climbed & bagged Pen Allt-mawr.

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?

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