Y Llethr

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Y Llethr
Y Llethr across Llyn Hywel from scree slope of Rhinog Fach - geograph.org.uk - 534766.jpg
Y Llethr from above Llyn Hywel
Highest point
Elevation756 m (2,480 ft)
Prominence561 m (1,841 ft)
Parent peakMoel Siabod
ListingMarilyn, Hewitt, Nuttall
Coordinates52°48′46.8″N 3°59′9.6″W / 52.813000°N 3.986000°W / 52.813000; -3.986000Coordinates: 52°48′46.8″N 3°59′9.6″W / 52.813000°N 3.986000°W / 52.813000; -3.986000
English translationthe slope
Language of nameWelsh
PronunciationWelsh: [ə ˈɬɛθɾ]
LocationGwynedd, Wales
Parent rangeRhinogydd
OS gridSH661258
Topo mapOS Landranger 124
Listed summits of Y Llethr
Name Grid ref Height Status
Diffwys 750 metres (2,461 ft) sub Marilyn, Hewitt, Nuttall
Rhinog Fach 712 metres (2,336 ft) sub Marilyn, Hewitt, Nuttall
Crib-y-rhiw 670 metres (2,198 ft) Nuttall

Y Llethr is the highest mountain in the Rhinogydd range of Snowdonia, in north Wales. The summit consists of a flat grassy top marked only by a small cairn. The summit is more in keeping with its southern flanks than its rugged northern approach.

The shortest route to the summit goes from the valley of Cwm Nantcol in the west, either directly or via Bwlch Drws Ardudwy and over the mountain of Rhinog Fach. To the south lies the mountain of Diffwys, to the south-east lies the mountain of Y Garn, to the north lies Rhinog Fach and to the west lies the hill of Moelfre.[1][2][3]


  1. ^ Marsh, Terry. The Summits of Snowdonia, (London: Robert Hale, 1984).
  2. ^ Marsh, Terry. The Mountains of Wales, (London: Hodder and Stoughton, 1985).
  3. ^ Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.