Mountain (Hewitt), Nuttall  & Marilyn Icon

Craig Cwm Silyn
734m (2409ft)

The Moel Hebog Area, Snowdonia, Gwynedd, Wales

Craig Cwm Silyn means 'Silyn Valley Crag' in Welsh and is pronounced 'crag koom sileen'.

The summit of Craig Cwm Silyn is marked by a stone shelter.


Record Craig Cwm Silyn as Bagged, Climbed & Conquered


Welsh Mountain Icon

Welsh Mountain
55th highest in Wales,
134th in England & Wales

Welsh Nuttall Icon

Welsh Nuttall
69th highest in Wales,
166th in England & Wales

Welsh Marilyn Icon

Welsh Marilyn
25th highest in Wales,
514th highest in Great Britain

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

Snowdonia National Park


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

OL17 Snowdon/Yr Wyddfa and Conwy Valley/Dyffryn Conwy


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

115 Snowdon & Caernarfon


See Craig Cwm Silyn and the surrounding tops on our free-to-access 'Google Style' Peak Bagging Maps:

See Craig Cwm Silyn and the surrounding tops on our downloadable PDF Peak Bagging Map:


You can walk to the top of Craig Cwm Silyn by using any of these 3 easy‑to‑follow route maps:
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Walk gw203 Craig Cwm Silyn, Garnedd-goch and Mynydd Graig Goch from Cors y Llyn

The UK's 'newest' Welsh mountain

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Vital Statistics:

Length: 7mls (11.5km)
Ascent:2,123ft (647m)
Time:4.75hrs
Grade:Walk Grade 5 Icon (Moderate)
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Walk gw201 The Nantlle Ridge from Rhyd-Ddu

Classic Welsh Ridge Walk

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Vital Statistics:

Length: 9.5mls (15.5km)
Ascent:4,017ft (1,224m)
Time:7.75hrs
Grade:Walk Grade 7 Icon (Hard)
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Walk gw164 The full Nantlle Ridge and Craig Cwm Silyn from Rhyd-Ddu

Tough one for the Peak Baggers (see note)

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Vital Statistics:

Length: 11.5ml (18.5km)
Ascent:4,496ft (1,370m)
Time:8.75hrs
Grade:Walk Grade 8 Icon (Hard)

Other walkers who hiked, climbed, bagged and summited Craig Cwm Silyn Fellow go4awalkers who have already walked, climbed, summited & bagged Craig Cwm Silyn

Melfyn Parry walked up Craig Cwm Silyn on June 7th, 2023 [from/via/route] Started walk from the parking area at Llyn Cwm Dulyn, quite close to the footbridge. The intention was to follow route GW203, however as there were 4 of us & the weather was really nice we decided to extend the route. We followed various paths from the footbridge until we joined a tarmac road at SH49160 51157 & then turned right up the hill. At the top there is a gate leading on to the moorland which brings you to Llynnau Cwm Silyn, walk in between the two lakes & then head on up to the obelisk on Tal y Mignedd. From here we descended on easy to follow paths to Bwlch Dros Bern & then headed for the top of Craig Cwm Silyn. From here we followed Route GW203 to pass over the top of Garnedd Goch & then Mynydd Graig Goch before dropping down the path to the other side of Llyn Cwm Dulyn & back to the car. [with] With DS, KG and BM [weather] Sunny & reasonably warm all day. Visibility was excellent - Stunning views in all directions from the summits. Extending the route made it a 10 mile walk rather than the 7 miles quoted for GW203

Donovan Suddell climbed Craig Cwm Silyn on April 10th, 2023 [from/via/route] Cors y llyn [with] wife [weather] Rainy, cloudy, some clear intervals

Mark Davidson bagged Craig Cwm Silyn on August 5th, 2003 [from/via/route] Walk gw164 The full Nantlle Ridge & Craig Cwm Silyn from Rhyd-Ddu [with] Alone [weather] Nice & sunny - perfect conditions for top ridge walks in the UK

Andy Buxton hiked Craig Cwm Silyn during August, 1964 [from/via/route] Nantlle Ridge from Rhyd-Ddu to Nantlle [with] Dad

Bleddyn Rhys summited Craig Cwm Silyn on August 29th, 2011 [from/via/route] O'r pub yn rhyd ddu i Garn [with] AR ben fy hyn bach [weather] Amrywiol, cymylog a gwlyb weithiau - Wedi gwneud y ridge yma sawl gwaith, gan gynwys un tro gyda Kev ar ol cysgu yn Rhyd Ddu yn 2013 neu 2014 on doedd gennai ddim camera!

Christina Lander conquered Craig Cwm Silyn on August 16th, 2016 [from/via/route] Nantlle Ridge Rhyd-Ddu - Y Garth - Mynydd Drws Y Coed - Trum Y Ddysgl - Mynydd Tal Y Mignedd - Craig Cwm Silyn - Garnedd Goch - Mynydd Craig Goch - Llyn Cwm Dulyn - Nebo [with] Dick [weather] Perfect sunny day

Gerald Murphy scaled Craig Cwm Silyn on April 18th, 2015 [from/via/route] Rhyd Ddu & the Nantlle Ridge [with] Friend Ben Albanese [weather] Clear, Sunny, Dry, Cold before lunch, winds of 40mph or so.

Louis Smith, Math Llwyd, Linda Mckeogh, Paul Booth and Trevor Williams have all walked, climbed & bagged Craig Cwm Silyn.

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 Craig Cwm Silyn

Moel Lefn (centre), Moel yr Ogof and Moel Hebog (right) from the summit of Craig Cwm Silyn

Moel Lefn (centre), Moel yr Ogof and Moel Hebog (right) from the summit of Craig Cwm Silyn

Photo: Gerald Murphy (170)

The summit of Craig Cwm Silyn with Moel Lefn, Moel yr Ogof & Moel Hebog in the background (far left)

The summit of Craig Cwm Silyn with Moel Lefn, Moel yr Ogof & Moel Hebog in the background (far left)

Photo: Gerald Murphy (165)

Mynydd Mawr (Llyn Celyn), Craig y Bera, Mynydd Tal-y-mignedd and Mynydd Drws-y-coed from the summit of Craig Cwm Silyn with Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd & Yr Aran on the horizon (centre) and Moel Lefn, Moel yr Ogof & Moel Hebog on the far left

Mynydd Mawr (Llyn Celyn), Craig y Bera, Mynydd Tal-y-mignedd and Mynydd Drws-y-coed from the summit of Craig Cwm Silyn with Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd & Yr Aran on the horizon (centre) and Moel Lefn, Moel yr Ogof & Moel Hebog on the far left

Photo: Gerald Murphy (166)

Bwlch Dros-bern and Craig Cwm Silyn from Mynydd Tal-y-mignedd

Bwlch Dros-bern and Craig Cwm Silyn from Mynydd Tal-y-mignedd

Photo: Gerald Murphy (161)

The Nantlle Ridge - Garnedd-goch, Craig Cwm Silyn, Mynydd Tal-y-mignedd, Bwlch Dros-bern, Trum y Ddysgl and Mynydd Drws-y-coed - from Moel Lefn

The Nantlle Ridge - Garnedd-goch, Craig Cwm Silyn, Mynydd Tal-y-mignedd, Bwlch Dros-bern, Trum y Ddysgl and Mynydd Drws-y-coed - from Moel Lefn

Photo: Gerald Murphy (208)

Mynydd Tal-y-mignedd and Mynydd Drws-y-coed from the summit of Craig Cwm Silyn

Mynydd Tal-y-mignedd and Mynydd Drws-y-coed from the summit of Craig Cwm Silyn

Photo: Gerald Murphy (168)

Mynydd Tal-y-mignedd (centre left) and Craig Cwm Silyn (centre right) from Craig y Bera on Mynydd Mawr (Llyn Cwellyn)

Mynydd Tal-y-mignedd (centre left) and Craig Cwm Silyn (centre right) from Craig y Bera on Mynydd Mawr (Llyn Cwellyn)

Photo: Gerald Murphy (136)

On Bwlch Dros-bern between Mynydd Tal-y-mignedd and Craig Cwm Silyn

On Bwlch Dros-bern between Mynydd Tal-y-mignedd and Craig Cwm Silyn

Photo: David Zuckerman (28)

Cairn on the summit of Craig Cwm Silyn

Cairn on the summit of Craig Cwm Silyn

Photo: Gerald Murphy (174)

Craig Cwm Silyn (mid-ground) and Yr Eifl (The Rivals) on The Llyn peninsula (in the distance) and The Jubilee Monument Obelisk on the summit of Mynydd Tal-y-mignedd

Craig Cwm Silyn (mid-ground) and Yr Eifl (The Rivals) on The Llyn peninsula (in the distance) and The Jubilee Monument Obelisk on the summit of Mynydd Tal-y-mignedd

Photo: Gerald Murphy (162)

Moel Lefn towers over Blaen-pennant in Cwm Trwsg from the lower slopes of Craig Cwm Silyn

Moel Lefn towers over Blaen-pennant in Cwm Trwsg from the lower slopes of Craig Cwm Silyn

Photo: David Zuckerman (32)

Mynydd Mawr (Llyn Celyn) and Craig y Bera from the summit of Craig Cwm Silyn

Mynydd Mawr (Llyn Celyn) and Craig y Bera from the summit of Craig Cwm Silyn

Photo: Gerald Murphy (167)

Craig Cwm Silyn from Mynydd Tal-y-mignedd

Craig Cwm Silyn from Mynydd Tal-y-mignedd

Photo: Gerald Murphy (163)

The Nantlle Ridge - Garnedd-goch, Craig Cwm Silyn, Mynydd Tal-y-mignedd, Bwlch Dros-bern and Mynydd Drws-y-coed - from Moel Yr Ogof

The Nantlle Ridge - Garnedd-goch, Craig Cwm Silyn, Mynydd Tal-y-mignedd, Bwlch Dros-bern and Mynydd Drws-y-coed - from Moel Yr Ogof

Photo: Gerald Murphy (201)

The Craig Cwm Silyn summit ridge from Garnedd-goch

The Craig Cwm Silyn summit ridge from Garnedd-goch

Photo: David Zuckerman (31)

Bwlch Dros-bern and Craig Cwm Silyn  - with Gyrn Goch, Bwlch Mawr & Gyrn Ddu (far right) from the summit of Mynydd Tal-y-mignedd

Bwlch Dros-bern and Craig Cwm Silyn - with Gyrn Goch, Bwlch Mawr & Gyrn Ddu (far right) from the summit of Mynydd Tal-y-mignedd

Photo: Gerald Murphy (160)

The summit of Craig Cwm Silyn with Moel Lefn in the background

The summit of Craig Cwm Silyn with Moel Lefn in the background

Photo: Gerald Murphy (172)

Look! Its me ;-) on Moel Hebog last April with Craig Cwm Silyn (left), Mynydd Tal-y-mignedd (centre right), Trum y Ddysgl (right) on the horizon and Moel Lefn and Moel yr Ogof in the mid-distance

Look! Its me ;-) on Moel Hebog last April with Craig Cwm Silyn (left), Mynydd Tal-y-mignedd (centre right), Trum y Ddysgl (right) on the horizon and Moel Lefn and Moel yr Ogof in the mid-distance

Photo: Hilda Wright (1)

Craig Cwm Silyn and Mynydd Tal-y-mignedd

Craig Cwm Silyn and Mynydd Tal-y-mignedd

Photo: David Zuckerman (22)

The Nantle Ridge - Mynydd Tal-y-mignedd (front left), The Hiatus (front right), Trum y Ddysgl (right) and Y Garn (Moel Hebog) (centre) from the summit of Craig Cwm Silyn

The Nantle Ridge - Mynydd Tal-y-mignedd (front left), The Hiatus (front right), Trum y Ddysgl (right) and Y Garn (Moel Hebog) (centre) from the summit of Craig Cwm Silyn

Photo: Gerald Murphy (173)


. . . see all 22 walk photographs & pictures of views from, on or of Craig Cwm Silyn


Send us your photographs and pictures on, of, or from Craig Cwm Silyn

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