Page Type Page Type: Mountain/Rock
Location Lat/Lon: 52.81532°N / 3.98435°W
Additional Information County: Wales
Activities Activities: Hiking, Mountaineering
Seasons Season: Spring, Summer, Fall, Winter
Additional Information Elevation: 2480 ft / 756 m
Sign the Climber's Log


At a modest height of 754 metres above sea level, Y Llethr (which literally means ‘The Slope’) is the highest mountain in the Rhinogydd. Despite its preeminent height, it's one of the range’s least visited summits, the majority of visitors (though they be low in number) preferring to climb the arguably more interesting slopes of Rhinog Fawr and Rhinog Fach. There is little for the rock climber here either, since the majority of its known crags are too broken or too short to offer anything approaching a tangible line.

So you may now be wondering, beyond a simple tick on an arbitrary list of summits, what does climbing Y Llethr have to offer? The answer, in all honesty, is not a whole lot. What it does offer is solitude, great views and a chance to visit a little bit of Wales that few others have seen, but considering what’s on offer elsewhere, this perhaps, is not quite enough. So if you’re intent of exploring the Rhinogydd and your time is limited, don’t succumb to the megalomaniacal pursuit of aiming for the highest point like so many seem to do, instead look to the range’s smaller summits, for they offer something far more satisfying.

Mountain Conditions

The Rhinogydd. From left to right - Y Garn, Diffwys, Y Llethr, Rhinog Fach and Rhinog Fawr (Photo by Nanuls)

This section displays the mountain conditions for the Snowdonia National Park, of which Y Llethr is a part. Click on the widget for maps and further details.

This Snowdonia weather forecast is generated by the Met Office Weather Widget

Essential Gear

Y Llethr can be climbed at anytime of the year, however in poor conditions the mountain's rock routes are best avoided, particularly if the weather has been wet. March to April offer the most reliable conditions. Of course this all depends on ones ability as a mountaineer/climber, and what might be comfortable for some may seem daunting to others.

If you’re lucky enough to climb the mountain in winter conditions then an ice axe and crampons would be very useful.

Getting There

Y Llethr is located in the southern portion of the Rhinogydd and can be approached from numerous directions. The best stars however, are all located on the range’s western side, either starting in Cwm Nantcol or Dyffryn Ardydwy.

The best starting point is probably from near Cil-Cychwyn (SH 633 258) in Cwm Nantcol, which can easily be reached along narrow roads by leaving the A496, which runs along the coast from Llanulltyd near Dolgellau in the south to Blaenau Ffestiniog in the north, at Llanbedr or Dyffryn Ardydwy.

Alternatively it’s also possible to approach the mountain from the south by parking at Bontddu (SH 672 188) or Cwm Mynach (SH 684 215). The routes from here are less satisfying that the other options though.

The area can also be reached by rail, however getting from the stations to the mountains themselves can be difficult as public transport is pretty infrequent and hitching can be a bit of a nightmare these days.

Y LlethrY Llethr
(Photo by Nanuls)
Y LlethrY Llethr
(Photo by Nanuls)
Y LlethrY Llethr
(Photo by Nanuls)

Red Tape and Access

No red tape or access issues here!

For climbers, hill walkers and mountaineers, the British Mountaineering Council (BMC) runs a Regional Access Database, which holds mountain/crag specific information on matters of conservation and access, including issues such as nesting restrictions, nature designations and preferred parking.

Regional Access Database

If you are in any doubt about any particular access arrangement, or need to report an incident, you should contact your local BMC Access Representative or the BMC Access Officers for Wales: Elfyn Jones.

Camping and Accommodation

There’s an almost unlimited supply of accommodation within the Snowdonia National Park so it would be inappropriate to list it all here. For budget accommodation it’s worth checking out some of the following sites:

Youth Hostel Association in Wales

Independent Hostel Guide

Campsites in Gwynedd

For more local options, there are a number of campsites that surround the range. Nearby campsites can be found at Cae Gwyn Farm (SH 713 297) to the east of the range, and Merthyr Farm (SH 600 319) to the west.

For wild camping Llyn Hywl (SH 662 267) and Llyn Bodlyn (SH 648 239) make an excellent locations.

Y Llethr (Photo by Nanuls)


Open Space Web-Map builder Code
Navigation Maps

Ordnance Survey 1:25k Explorer Series OL 18 Harlech, Porthmadog & Bala/Y Bala

Ordnance Survey 1:50k Landranger Series 124 Porthmadog & Dolgellau

Harvey Map Services 1:25k Rhinogs/Rhinogydd

Harvey Map Services/BMC 1:40k Snowdonia South

Road Maps

Ordnance Survey Tour Series 10 North & Mid Wales


Snowdonia (Official National Park Guide) Snowdonia (Official National Park Guide by Merfyn Williams with contributions from Ian Mercer and Jeremy Moore

A handy book full of useful information and interesting facts about the National Park.
The Mountains of England and Wales: Vol 1 Wales The Mountains of England and Wales: Vol 1 Wales by John and Ann Nuttall

A classic book covering the Welsh ‘Nuttalls’, which obviously include the Rhinogydd.
Hillwalking in Snowdonia Hillwalking in Snowdonia by Steve Ashton

A guidebook to nearly 70 hillwalking routes throughout Snowdonia, including the Rhinogydd.
Hillwalking in Wales Vol 2 Hillwalking in Wales Vol 2 by Peter Hermon

The second of two guidebooks describing walking routes up every 2000-footer in Wales – covers the Moelwynion to the Tarrenydd.

External Links

Y LlethrY Llethr (Photo by Nanuls)
Y Llethr
Y Llethr (Photo by Nanuls)
Rhinog FachRhinog Fach (Photo by Nanuls)

Government Bodies and Official Organisations

Snowdonia National Park Authority

Council for National Parks

Association of National Park Authorities

Natural Resources Wales


Royal Commission on Ancient & Historical Monuments in Wales

Gwynedd Archaeological Trust

Snowdonia Society

The National Trust

Hiking, Climbing and Mountaineering Organisations and Companies

British Mountaineering Council

The Climbers’ Club


Plas y Brenin National Mountain Centre

Hightreck Snowdonia


Mountain Weather Wales

Weather from the Met Office

BBC Weather

Tourist Information

Visit Wales

North Wales Tourism Partnership

Local Information from

Local Information from Snowdonia Wales Net

North Wales Index


Welsh Public Transport Information

UK Train Timetable


Youth Hostel Association in Wales

Pete's Eats

Pen-y-Gwryd Hotel

Maps and Guidebooks

Ordnance Survey

Harvey Map Services

Cicerone Guidebooks

Climbers’ Club Guidebooks


North Wales Bouldering

Cordee Travel and Adventure Sports Bookshop

Wildlife and Conservation

Joint Nature Conservation Committee

Natur Gwynedd

North Wales Wildlife Trust

Royal Society for the Protection of Birds