Mountain (Hewitt), Nuttall  & Marilyn Icon

Glasgwm
779m (2556ft)

The Arans, Gwynedd, Wales

*Glasgwm is actually just outside of The National Park Boundary


Record Glasgwm as Bagged, Climbed & Conquered


Welsh Mountain Icon

Welsh Mountain
41st highest in Wales,
95th in England & Wales

Welsh Nuttall Icon

Welsh Nuttall
52nd highest in Wales,
117th in England & Wales

Welsh Marilyn Icon

Welsh Marilyn
18th highest in Wales,
432nd highest in Great Britain

Walk Glasgwm walking UK Mountains in The Arans Snowdonia National Park*<br> Gwynedd, Wales

Glasgwm Summit

Photo: Jamie Hodgeson

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


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

OL23 Cadair Idris & Bala Lake/Llyn Tegid


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

124 Dolgellau & Porthmadog


125 Bala & Lake Vyrnwy, Berwyn


Glasgwm on our free-to-access 'Google Style' Peak Bagging Map:

See Glasgwm and the surrounding tops on our downloadable PDF Peak Bagging Map:


You can walk to the top of Glasgwm by using this easy‑to‑follow route map:
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Walk gw149 Glasgwm and Pen y Brynfforchog from Cwm Cywarch

Dramatic mountain views

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Vital Statistics:

Length: 7.5ml (12km)
Ascent:2,721ft (829m)
Time:5½ hrs
Grade:Walk Grade 6 Icon (Moderate)

Other walkers who hiked, climbed, bagged and summited Glasgwm Fellow go4awalkers who have already walked, climbed, summited & bagged Glasgwm

Melfyn Parry walked up Glasgwm on July 19th, 2024 [from/via/route] Followed go4awalk route GW149 - from the car park at the top of Cwm Cywarch. The walk up to the Bwlch is a steady pull up, but remember to turn around every now & then as the views are amazing. Once you reach the stile at the corner of the fence by the small pool the path follows the fence pretty much to the summit of Glasgwm. The beehive cairn on the summit is a decent size & again the views over towards Aran Fawddwy are spectacular. The walk to the next top is quite easy, the path is clear with some boggy bits to navigate. Once on the top of the grassy hill of Pen Y Brynfforchog you are looking down at the Mac loop so listen out for the fast jets on training exercise. The walk notes (6 to 9) suggest you head back to the forest edge to pick up a path which eventually joins the forest track, this is no longer deforested & is quite hard work, best to walk down the grassy path & around the forest to reach SH823282 then you are much closer to the end of the forest track which is easy walking on to reach point A on the notes, from here the notes are good. The zig zag path is quite steep & is punishing on the knees & thighs. [with] On my own [weather] Warm sunny spells & dry. Excellent visibility. - As mentioned above, plot a route to avoid walking through the forested areas

Donovan Suddell climbed Glasgwm on December 17th, 2021 [from/via/route] Cwm Cywarch gw149 [with] father in law [weather] Cloudy & misty

Bleddyn Rhys bagged Glasgwm on May 17th, 2019 [from/via/route] Ar hyd y gribin o Dinas Mawddwy [with] Ar ben fy hyn... [weather] Eithaf braf ond 'hazy' - gwynt ar y topiau. - Hirach nag oeddwn wedi ei feddwl. Dringo fynnu'r ochor o'r pentraf yn serth iawn!

Tony Lennon hiked Glasgwm on March 26th, 2019 [from/via/route] Mine road [with] Ed [weather] changeable, -5 windchill

Mark Davidson summited Glasgwm on August 10th, 2007 [with] Theresa [weather] Bit grey with some of the tops in mist

Christina Lander conquered Glasgwm on September 26th, 2015 [from/via/route] Cwm Cywarch - Glasgwm - Pen y Brynfforchog - Nany y Craig-wen - Cwm yr Ychen - Cwm Cywarth [with] Dick [weather] Lovely sunny, warm day

Robert Taylor-Marriott scaled Glasgwm on November 6th, 2012 [from/via/route] Route 43: Glasgwm & Pen y Brynfforchhog (GPB) Completed 06.11.12 [with] Vince Wetton 7 Robert Taylor-Marriott. [weather] Sunny.

Vince Wetton walked up Glasgwm on November 5th, 2012 [with] RTm [weather] Sunny Snow on Peaks

Kath Edwards has climbed Glasgwm [with] Si Stokes [weather] Beautiful cold & clear day. - Did this walk on my 40th Birthday, cant think of a nicer place to spend it!!

Paul Booth, Trevor Williams and Stephen Hobdell have all walked, climbed & bagged Glasgwm.

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



More Photographs & Pictures of views from, on or of Glasgwm

Following this unnamed stream up to the bwlch between Glasgwm and Gwaun y Llwyni

Following this unnamed stream up to the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (280)

Following this unnamed stream up to the bwlch between Glasgwm and Gwaun y Llwyni

Following this unnamed stream up to the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (281)

Glasgwm from Pen y Brynfforchog (aka Pen y Brynnfforchog)

Glasgwm from Pen y Brynfforchog (aka Pen y Brynnfforchog)

Photo: Jamie Hodgeson (2)

Hengwm with Glasgwm (left) and Waun Camddwr (right) above from Waun Goch

Hengwm with Glasgwm (left) and Waun Camddwr (right) above from Waun Goch

Photo: Mark Kissipie (312)

Looking back down to Cwm Cywarch from the bwlch between Glasgwm and Gwaun y Llwyni

Looking back down to Cwm Cywarch from the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (283)

Glasgwm from Aran Fawddwy

Glasgwm from Aran Fawddwy

Photo: Dewi Roberts (4)

Gwaun y Llwyni from the bwlch between Glasgwm and Gwaun y Llwyni

Gwaun y Llwyni from the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (285)

Waterfalls on the unnamed stream up to the bwlch between Glasgwm and Gwaun y Llwyni

Waterfalls on the unnamed stream up to the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (282)

Ruin on the bwlch between Glasgwm and Gwaun y Llwyni

Ruin on the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (284)

The Glasgwm crags from the head of Cwm Cywarch

The Glasgwm crags from the head of Cwm Cywarch

Photo: Mark Kissipie (278)

Gwaun y Llwyni (with Glasgwm in the distance right) from the RAF Memorial on Drws Bach

Gwaun y Llwyni (with Glasgwm in the distance right) from the RAF Memorial on Drws Bach

Photo: Mark Kissipie (305)

Footbridge on the approach to the bwlch between Glasgwm and Gwaun y Llwyni

Footbridge on the approach to the bwlch between Glasgwm and Gwaun y Llwyni

Photo: Mark Kissipie (279)


Send us your photographs and pictures on, of, or from Glasgwm

If you would like to add your walk photographs and pictures featuring views from, on or of Glasgwm 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).)

Send us your photographs and pictures on, of, or from Glasgwm via Facebook

You can also submit photos via our Facebook Page.

NB. Please indicate where each photo was taken.




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