Route outline for walk gw187:
Llyn Ogwen - Ogwen Cottage - 'Tin Pan Alley' - Llyn Glyd - Y Garn (Glyderau) - Llyn y Cwm - Glyder Fawr - Bwlch y Ddwy-Glyder - Castell y Gwynt (Glyder Fach) - Glyder Fach - The Cantilever Stone - Bristly Ridge - Bwlch Tryfan - Llyn Bochlwyd - Ogwen Cottage - Pont Pen-y-benglog - Llyn Ogwen
Points of Interest/Notes on this walk:
Try and find time to have a look underneath Pont Pen-y-benglog (near Ogwen Cottage at the western end of Llyn Ogwen) where the remains of the original stone arched bridge built by Thomas Telford can be seen. Access the river bank is via a stile on NW side of the bridge.
Peaks, Summits and Tops reached on this walk:
![]() 3 Welsh Mountains |
![]() 0 Wainwrights |
![]() 4 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 Glyder Fawr at 999m (3279ft). Glyder Fawr is classified as a Welsh Mountain (Hewitt) (5th highest in Wales, 5th highest in England & Wales)
Glyder Fawr is also known as a Welsh Nuttall (5th highest in Wales, 5th highest in England & Wales) and a Welsh Marilyn (3rd highest in Wales, 111th highest in the UK).
Glyder Fawr means 'Large Heap or Large Pile of Stones' in Welsh and is pronounced 'g-lid-der var'.
Completing this walk will also take you to the top of Glyder Fach at 990m (3249ft). Glyder Fach is classified as a Welsh Mountain (Hewitt) (6th highest in Wales, 6th highest in England & Wales)
Glyder Fach is also known as a Welsh Nuttall (6th highest in Wales, 6th highest in England & Wales). Glyder Fach means 'Small Heap or Small Pile of Stones' in Welsh and is pronounced 'g-lid-der vach'.
You will also reach the summit of Castell y Gwynt (Glyder Fach) at 972m (3190ft). Castell y Gwynt (Glyder Fach) is also known as a Welsh Nuttall (9th highest in Wales, 10th highest in England & Wales). Castell y Gwynt (Glyder Fach) means 'Castle of the Wind' in Welsh.
Along the way you will also bag:
- Y Garn (Glyderau) at 947m (3108ft). Y Garn (Glyderau) is classified as a Welsh Mountain (Hewitt) (10th Wales, 13th Eng & Wal), a Welsh Nuttall (11th highest in Wales, 15th highest in England & Wales) and a Welsh Marilyn (4th Wales, 167th highest in the UK). Y Garn (Glyderau) means 'The Cairn' in Welsh and is pronounced 'ur gan (g-lid-der-rye)'.
The summit of Y Garn (Glyderau) is marked by a large cairn.
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 gw187 Y Garn (Glyderau), Glyder Fawr, Castell y Gwynt and Glyder Fach from Ogwen Cottage, Llyn Ogwen
In no particular order . . .

Sunset over Llyn Lockwood (centre bottom), Llyn Gywant, Y Lliwedd and Snowdon (Yr Wyddfa) from the Miner's Track near Glyder Fach

Bwlch y Ddwy-Glyder, Castell y Gwynt and Glyder Fach from Glyder Fawr in mist
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