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Pen Twyn Glas
646m (2120ft)

The Black Mountains, The Brecon Beacons, Powys, Wales


Tap/mouse over a coloured circle (1-3 easy walks, 4-6 moderate walks, 7-9 hard walks) and click to select.




Record Pen Twyn Glas as Bagged, Climbed & Conquered


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Welsh Nuttall
143rd highest in Wales,
339th in England & Wales

You can find Pen Twyn Glas & 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 Twyn Glas and the surrounding tops on our free-to-access 'Google Style' Peak Bagging Maps:

See Pen Twyn Glas and the surrounding tops on our downloadable PDF Peak Bagging Map:


You can walk to the top of Pen Twyn Glas by using any of these 4 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 po129 The Grwyne Fechan Round

Fine high mountain views

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Vital Statistics:

Length: 12ml (19km)
Ascent:2,637ft (804m)
Time:7 hrs
Grade:Walk Grade 7 Icon (Hard)
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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 Twyn Glas Fellow go4awalkers who have already walked, climbed, summited & bagged Pen Twyn Glas

Jonathan Morris walked up Pen Twyn Glas on January 18th, 2024 [from/via/route] Crickhowell [with] My Lonesome [weather] Clear but cold

Mark Davidson climbed Pen Twyn Glas 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 bagged Pen Twyn Glas on April 11th, 2021 [from/via/route] O Llanbedr. Horseshoe Route. [with] Solo [weather] Braf/ Cymylog

Simon Burgess hiked Pen Twyn Glas 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 summited Pen Twyn Glas on August 30th, 2017 [from/via/route] 3rd 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!

Christina Lander conquered Pen Twyn Glas 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] Warm & sunny

David Price scaled Pen Twyn Glas on July 13th, 2013 [from/via/route] Llanbedr [with] Jean [weather] Very hot & sunny - On the day 3 SAS soldiers died in the Beacons!

Tim Buckley walked up Pen Twyn Glas on September 28th, 2014 [from/via/route] po153 from Neuadd Fawr, set off at 8.30 am arrived here at 11.13am [with] Solo walk [weather] 20 degrees clear views - None, pressing on - miles to go

Wyn Griffiths climbed Pen Twyn Glas on March 5th, 2014 [from/via/route] From Neuadd Fawr [with] Me [weather] Dry, but very wet underfoot - esp adj to forrest on way to PTG. Saw 2 x Red Kites feed in air above me, & sure I heard an Owl - Great Walk

David Lane bagged Pen Twyn Glas on August 15th, 2008 [with] Kelly

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

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Send us your photographs and pictures on, of, or from Pen Twyn Glas

If you would like to add your walk photographs and pictures featuring views from, on or of Pen Twyn Glas 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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