Mountain (Hewitt), Nuttall  & Marilyn Icon

Y Llethr
756m (2481ft)

The Rhinogs Area, Snowdonia, Gwynedd, Wales


Tap/mouse over a coloured circle (1-3 easy walks, 4-6 moderate walks, 7-9 hard walks) and click to select.




Record Y Llethr as Bagged, Climbed & Conquered


Welsh Mountain Icon

Welsh Mountain
48th highest in Wales,
115th in England & Wales

Welsh Nuttall Icon

Welsh Nuttall
59th highest in Wales,
141st in England & Wales

Welsh Marilyn Icon

Welsh Marilyn
21st highest in Wales,
475th highest in Great Britain

Walk Y Llethr walking UK Mountains in The Rhinogs Area Snowdonia National Park Gwynedd, Wales

Y Llethr Summit

Photo: John Greaves

You can find Y Llethr & 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):

OL18 Harlech, Porthmadog & Bala/Y Bala


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

124 Dolgellau & Porthmadog


See Y Llethr and the surrounding tops on our free-to-access 'Google Style' Peak Bagging Maps:

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


You can walk to the top of Y Llethr by using this easy‑to‑follow route map:
Walking Boot Print Icon

Walk gw159 Rhinog Fawr, Rhinog Fach, Y Llethr and Diffwys from Cwm Nantcol

Fantastic - but very long and with two big ascents

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Vital Statistics:

Length: 12mls (19km)
Ascent:4,723ft (1,439m)
Time:9.25hrs
Grade:Walk Grade 8 Icon (Hard)

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

Christina Lander walked up Y Llethr on June 1st, 2023 [from/via/route] Y Llethr - Crib-y-rhiw - Diffwys, from the west [with] Dick [weather] Hot & sunny

Melfyn Parry climbed Y Llethr on May 17th, 2023 [from/via/route] Started walk from the car park at Maes y Garnedd at 08:45 & followed the route as described on GW159. Notes were generally very good. Path was not easy to follow down from Rhinog Fawr but eventually reached Bwlch Drws Ardudwy & struggled again to find the start of the path up Rhinog Fach, once found it was easy to follow to the summit although it was a hard slog. Once at the top navigation was straightforward to Llyn Hywel albeit quite slow progress due to the nature of the path. Another slog up to Llethr but easy path to follow. From Llethr the grassy path was much easier to make quicker progress & the next three tops (Crib y Rhiw, Diffwys & Diffwys West Top) were reached without difficulty. I decided to go down to Port Scethin & take the bridle path back but this was a mistake as the bridle path as shown on the OS didn't exist. It was hard going through reed beds, boggy land & clumps of heather & bilberry bushes to get back to the path leading back to the carpark, only seeing the bridle path for the final 400m or so. [with] On my own [weather] Sunny spells & quite warm at times especially on uphill sections when in lea of the breeze. On the tops the breeze was chilly. - Stunning views in all directions. Well worth the effort but the ascents are quite hard work, not for the faint hearted.

Donovan Suddell bagged Y Llethr on April 16th, 2021 [from/via/route] BontDdu [with] alone [weather] Sunny & clear.

Andy Buxton hiked Y Llethr on June 20th, 1968 [from/via/route] Roman Steps [with] BVGS [weather] Sunny/showers - Training for 14 Peaks (we reckoned that the 14 Peaks were good training for the Rhinogs!)

David Lane summited Y Llethr on May 10th, 1999 [with] Kelly

Linda Mckeogh, Mark Davidson, Paul Booth and Trevor Williams have all walked, climbed & bagged Y Llethr.

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 Y Llethr

Y Llethr and Llyn Hywel from the summit of Rhinog Fach

Y Llethr and Llyn Hywel from the summit of Rhinog Fach

Photo: John Greaves (30)

Crib-y-rhiw (foreground) and Diffwys from Y Llethr

Crib-y-rhiw (foreground) and Diffwys from Y Llethr

Photo: John Greaves (37)

360 panorama from the summit of Rhinog Fach featuring: Rhinog Fach. Cadair Idris (in the distance), Y Llethr, Moelfre (Rhinogs), Cwm Nantcol and Rhinog Fach

360 panorama from the summit of Rhinog Fach featuring: Rhinog Fach. Cadair Idris (in the distance), Y Llethr, Moelfre (Rhinogs), Cwm Nantcol and Rhinog Fach

Photo: John Greaves (28)

Y Llethr and  Crib-y-rhiw above Llyn Dulyn from Diffwys

Y Llethr and Crib-y-rhiw above Llyn Dulyn from Diffwys

Photo: John Greaves (40)

Y Llethr from the pass above Llyn Hywel

Y Llethr from the pass above Llyn Hywel

Photo: John Greaves (34)

Rhinog Fawr (centre left) and Rhinog Fach (centre right) and Llyn Hywel from Y Llethr

Rhinog Fawr (centre left) and Rhinog Fach (centre right) and Llyn Hywel from Y Llethr

Photo: John Greaves (35)

Rhinog Fach and Y Llethr with Bwlch Drws-Ardudwy below from Rhinog Fawr

Rhinog Fach and Y Llethr with Bwlch Drws-Ardudwy below from Rhinog Fawr

Photo: Justin Pickford (9)

Llyn Hywel below Y Llethr with Cadair Idris (in the distance centre left), Moelfre (Rhinogs) (in the distance centre right) and Cwm Nantcol from the summit of Rhinog Fach

Llyn Hywel below Y Llethr with Cadair Idris (in the distance centre left), Moelfre (Rhinogs) (in the distance centre right) and Cwm Nantcol from the summit of Rhinog Fach

Photo: John Greaves (32)

The Rhinogs featuring (left to right): Rhinog Fawr, Rhinog Fach, Y Llethr, Diffwys and Moelfre (Rhinogs) (behind the house) from Llandanwg

The Rhinogs featuring (left to right): Rhinog Fawr, Rhinog Fach, Y Llethr, Diffwys and Moelfre (Rhinogs) (behind the house) from Llandanwg

Photo: Steph Nevin (10)

Y Llethr from the modest cairn on the summit of Crib-y-rhiw

Y Llethr from the modest cairn on the summit of Crib-y-rhiw

Photo: John Greaves (38)

Y Llethr from Nantcol

Y Llethr from Nantcol

Photo: Justin Pickford (2)

Y Llethr from the summit of Rhinog Fach (with Cadair Idris in the distance behind the summit cairn)

Y Llethr from the summit of Rhinog Fach (with Cadair Idris in the distance behind the summit cairn)

Photo: John Greaves (29)


Send us your photographs and pictures on, of, or from Y Llethr

If you would like to add your walk photographs and pictures featuring views from, on or of Y Llethr 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 Y Llethr via Facebook

You can also submit photos via our Facebook Page.

NB. Please indicate where each photo was taken.






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