Route outline for walk gw164:
Rhyd-Ddu - Y Garn (Moel Hebog) - The Nantlle Ridge - Mynydd Drws-y-coed - Trum y Ddysgl - The Hiatus - Mynydd Tal-y-mignedd - Bwlch Dros-bern - Craig Cwm Silyn - Garnedd-goch - Craig Cwm Silyn - Cwm Pennant - Bwlch y Ddwy Elor - Beddgelert Forest - Cwm Marchnad - Llyn-y-Gader - Rhyd-Ddu
Points of Interest/Notes on this walk:
Rhyd Dduis pronounced'r-ee-th th-ee'
The arete up to the summit of Mynydd Drws-y-coed is steep, narrow and quite 'airy' in places. You should only attempt it in good weather and if you have a good head for heights.
The descent from Craig Cwm Silyn into Cwm Pennant is down very steep grass and only recommended in good, dry weather. Further more the climb back out of Cwm Pennant involves over 700ft of ascent across rough grass.
Peaks, Summits and Tops reached on this walk:
![]() 4 Welsh Mountains |
![]() 0 Wainwrights |
![]() 6 Welsh Nuttalls |
![]() 0 Welsh Deweys |
![]() 0 Wainwright Outlying Fells |
![]() 2 Welsh Marilyns |
![]() 0 Bridgets |
Peak Bagging Statistics for this walk:
The highest point of this walk is Craig Cwm Silyn at 734m (2409ft). Craig Cwm Silyn is classified as a Welsh Mountain (Hewitt) (55th highest in Wales, 134th highest in England & Wales)
Craig Cwm Silyn is also known as a Welsh Nuttall (69th highest in Wales, 166th highest in England & Wales) and a Welsh Marilyn (25th highest in Wales, 514th highest in the UK).
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.
Completing this walk will also take you to the top of Trum y Ddysgl at 709m (2327ft). Trum y Ddysgl is classified as a Welsh Mountain (Hewitt) (65th highest in Wales, 160th highest in England & Wales)
Trum y Ddysgl is also known as a Welsh Nuttall (84th highest in Wales, 202nd highest in England & Wales) and a Welsh Marilyn (32nd highest in Wales, 572nd highest in the UK).
Trum y Ddysgl means 'Dish Ridge' in Welsh and is pronounced 'tree-mee-th-isgl'.
You will also reach the summit of Garnedd-goch at 700m (2297ft). Garnedd-goch is also known as a Welsh Nuttall (87th highest in Wales, 220th highest in England & Wales). Garnedd-goch means 'Red Cairn' in Welsh and is pronounced 'ga-neth goch'.
The summit of Garnedd-goch is marked by a derelict Trig Point.
Along the way you will also bag:
- Mynydd Drws-y-coed at 695m (2281ft). Mynydd Drws-y-coed is classified as a Welsh Mountain (Hewitt) (70th Wales, 178th Eng & Wal) and a Welsh Nuttall (90th highest in Wales, 230th highest in England & Wales). Mynydd Drws-y-coed means 'The Door to Wood Mountain' in Welsh and is pronounced 'minith droos-ee-coy-ed'.
The summit of Mynydd Drws-y-coed is unmarked, just grass.
- Mynydd Tal-y-mignedd at 653m (2143ft). Mynydd Tal-y-mignedd is classified as a Welsh Mountain (Hewitt) (102nd Wales, 244th Eng & Wal) and a Welsh Nuttall (138th highest in Wales, 327th highest in England & Wales). Mynydd Tal-y-mignedd means 'Mountain at the End of the Bog' in Welsh and is pronounced 'minith tal-ee-meeg-neth'.
The summit of Mynydd Tal-y-mignedd is marked by a tall stone tower.
- Y Garn (Moel Hebog) at 633m (2078ft). Y Garn (Moel Hebog) is known as a Welsh Nuttall (152nd highest in Wales, 363rd highest in England & Wales). Y Garn (Moel Hebog) means 'The Cairn' in Welsh and is pronounced 'uh-gan'.
The summit of Y Garn (Moel Hebog) is marked by a cairn & a huge shelter.
You can find more walks near this one 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):
1:50,000 scale OS Landranger Map (the ones with pink/magenta covers):
Some Photos and Pictures from Walk gw164 The full Nantlle Ridge and Craig Cwm Silyn from Rhyd-Ddu
In no particular order . . .

The Snowdon Massif (Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd & Yr Aran) and Llyn y Dywarchen from Mynydd Drws-y-coed

Mynydd Mawr (Llyn Cwellyn) from Trum y Ddysgl - with Moel Eilio (Llanberis) (beyond right)

On the summit of Y Garn (Moel Hebog) with the Snowdon (Yr Wyddfa) group in the background

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

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

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

Yr Eifl (The Rivals) on The Llyn peninsula from the summit of Mynydd Tal-y-mignedd

Mynydd Drws-y-coed (left) and Y Garn (Moel Hebog) from the Nantlle Road (B4418) near Rhyd Ddu

Mynydd Mawr (Llyn Cwellyn), Y Garn (Moel Hebog), The Nantlle Ridge and Mynydd Drws-y-coed from Trum y Ddysgl - with The Snowdon Massif (Moel Eilio (Llanberis), Foel Gron, Moel Cynghorion, Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd and Yr Aran) forming the backdrop

Mynydd Drws-y-coed and The Nantlle Ridge with Moel Hebog, Moel Lefn and Moel yr Ogof in the distance (left) from Y Garn (Moel Hebog)

The Hiatus (bottom centre), Mynydd Tal-y-mignedd (far right) and Yr Eifl (The Rivals) on the Llyn peninsula (top far left) from Trum y Ddysgl

The Snowdon Massif - Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa) & Y Lliwedd beyond Llyn-y-Gader from Cwm Marchnad at the northern edge of Beddgelert Forest

Mynydd Mawr (Llyn Cwellyn) (left), Llyn Cwellyn, Moel Eilio (Llanberis) (right) and Foel Gron (far right) from the Rhyd Ddu path

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

Y Garn (Moel Hebog) from Trum y Ddysgl - with Foel Goch (left), Moel Cynghorion (right) and Elidir Fawr between

The Moelwyns - Cnicht (left) and Moelwyn Mawr (right) - from Mynydd Tal-y-mignedd

The Nantlle Ridge - Mynydd Drws-y-coed (left) and Trum y Ddysgl from Y Garn (Moel Hebog) summit

Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd & Yr Aran from the summit of Craig Cwm Silyn

Mynydd Drws-y-coed & The Nantlle Ridge - with The Snowdon Massif (Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd and Yr Aran) beyond from Trum y Ddysgl

Mynydd Drws-y-coed (The Nantlle Ridge) and Trum y Ddysgl from Y Garn (Moel Hebog)

Mynydd Drws-y-coed (The Nantlle Ridge) and Y Garn (Moel Hebog) (right) from Rhyd Ddu

Climbing Mynydd Drws-y-coed on the Nantlle Ridge with Trum y Ddysgl beyond (right)

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

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

Mynydd Drws y Coed (far left), Y Garn (Moel Hebog Area) (left) and Mynydd Mawr (Llyn Cwellyn) (right)

The Snowdon Massif - featuring Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Bwlch Main, Llechog (Llanberis Path), Clogwyn Du and Y Lliwedd from Y Garn (Moel Hebog) with Llyn y Dywarchen and Rhyd Ddu in the valley below

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

The Nantlle Ridge - Mynydd Drws-y-coed (left) and Trum y Ddysgl from a cairn on the slopes of Y Garn (Moel Hebog)

Craig y Bera and Mynydd Mawr (Llyn Cwellyn) tower above Drws-y-coed from Y Garn (Moel Hebog)

Llyn-y-Gader with Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd & Yr Aran (right) from Beddgelert Forest near Cwm Marchnad

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

Llyn Nantlle Uchaf, Dyffryn Nantlle and the shoulder of Mynydd Mawr from Y Garn (Moel Hebog)

Mynydd Mawr (Llyn Cwellyn), Craig y Bera and Moel Eilio (Llanberis) from Y Garn (Moel Hebog)

Llyn Nantlle Uchaf, Dyffryn Nantlle, Mynydd Mawr, Rhyd Ddu, Llyn y Dywarchen, The Snowdon Massif (Moel Eilio (Llanberis), Foel Gron, Moel Cynghorion, Garnedd Ugain (Crib y Ddysgl), Snowdon (Yr Wyddfa), Y Lliwedd and Yr Aran from Y Garn (Moel Hebog)

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

Moel Hebog, Moel Lefn and Moel yr Ogof from Trum y Ddysgl with Bwlch-y-Ddwy-elor bottom left

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