Route outline for walk gw203:
Cors y Llyn - Afon Cwm Dulyn - Braich y Llyn - Garnedd-goch - Clogwyn y Cysgod - Craig yr Ogof - Craig Cwm Silyn - Garnedd-goch - Bwlch Cwmdulyn - Mynydd Graig Goch - Cors y Llyn.
Points of Interest/Notes on this walk:
Mynydd Graig Goch was always thought to be 1998ft (609m) high, but in 2008 modern survey techniques established the summit to be 609.75 above mean sea level, reaching the mountain status threshold (2000ft & 100ft of 'prominence') by 15cm (six inches).
For more information about what makes a mountain - a mountain see A Mountain is a Mountain - isn't it?
Peak Bagging Statistics for this walk:
![]() 2 Welsh Mountains |
![]() 0 Wainwrights |
![]() 3 Welsh Nuttalls |
![]() 0 Welsh Deweys |
![]() 0 Wainwright Outlying Fells |
![]() 1 Welsh Marilyn |
![]() 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) (56th highest in Wales, 135th highest in England & Wales). Craig Cwm Silyn is also known as a Welsh Nuttall (70th highest in Wales, 167th highest in England & Wales). Craig Cwm Silyn is also classified as a Welsh Marilyn (25th highest in Wales, 514th highest in the UK).
Completing this walk will also take you to the top of Garnedd-goch at 700m (2297ft). Garnedd-goch is also known as a Welsh Nuttall (87th highest in Wales, 221st highest in England & Wales).
You will also reach the summit of Mynydd Graig Goch at 610m (2000ft). Mynydd Graig Goch is classified as a Welsh Mountain (Hewitt) (136th highest in Wales, 318th highest in England & Wales). Mynydd Graig Goch is also known as a Welsh Nuttall (188th highest in Wales, 443rd highest in England & Wales).
This walk is on Ordnance Survey Maps:
OS Explorer Map OL17 | |
1:25,000 scale (Orange Covers) |
|
OS Landranger Map 115 | |
1:50,000 scale (Pink Covers) |
Some Photos and Pictures from Walk gw203 Craig Cwm Silyn, Garnedd-goch and Mynydd Graig Goch from Cors y Llyn
In no particular order . . .

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

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

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

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

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

Mynydd Tal-y-mignedd and Mynydd Drws-y-coed 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
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