Y Garn

Y Garn (Glyderau)

Y Garn stands above Cwm Idwal in the Glyderau, within Eryri (Snowdonia) National Park. This is the summit at SH630595, not the other Welsh hills called Y Garn. The current Database of British and Irish Hills gives 946 m (3,104 ft) and 234 m prominence for record 1972. Older guides commonly give 947 m. It remains one of the Welsh 3,000-foot mountains. DoBIH

Summit and views

The summit feature is a stone cairn/shelter. In clear weather the outlook includes Tryfan, the Glyderau, the Carneddau, the Yr Wyddfa (Snowdon) group and the Ogwen valley. Cwm Clyd and Cwm Cywion lie on the mountain’s eastern side. Cloud can remove both the view and obvious route-finding cues. Walkhighlands

Mountain routes

Choose a detailed mapped route and plan the whole return before setting off.

• Ogwen circular: reach Llyn Idwal, climb the north-east ridge, descend to Llyn y Cwn, then return by the steep constructed path beside Devil’s Kitchen. The circuit can also be walked in reverse. The walking path does not go through the dark gully itself. Walking Britain
• North-east ridge out-and-back: the same steep ridge provides a direct ascent and return from Ogwen. Loose ground and nearby crags require careful footwork, especially descending. Walking Britain
• Glyder Fawr extension: from Y Garn, descend to Llyn y Cwn before the steep scree ascent to Glyder Fawr. Return to the lake and the Devil’s Kitchen walking path if using the Ogwen outline here. This adds substantial climbing and rocky summit navigation. The return crosses steep, loose ground. Glyders topography
• Nant Peris: Esgair Ceunant is a western approach. A circuit can return by Llwybr y Carw through Cwm Padrig. It has faint and eroded sections, a misleading branch above difficult ground and a road return. Cwm Clyd is on the opposite, eastern side. Mud and Routes

The nearby peaks of Tryfan (917.5 m) and Elidir Fawr (924 m) are separate mountain objectives, each requiring its own route plan. Combining summits is not a casual extension. DoBIH

Getting there

The usual Ogwen start is Cwm Idwal Visitor Centre, SH64930 60366, beside the A5 at the western end of Llyn Ogwen. The National Park’s small pay-and-display car park fills quickly; use designated parking and keep roads and emergency access clear. The T10 links Bangor, Bethesda and Betws-y-Coed with Ogwen. Check current services and the last return before travelling. Toilets and a snack bar are available at the centre; check opening arrangements for refreshments. National Trust · Eryri National Park

Terrain and safety

Y Garn is a strenuous mountain walk, with steep rocky paths, loose scree, grassy ground and wet sections. The north-east ridge and the Devil’s Kitchen approach need confidence on steep terrain. Rain makes rock slippery and can make streams awkward to cross. Navigation is important in cloud, and summit-edge crags are a serious hazard.

Check the Met Office mountain forecast, carry a map and compass and know how to use them. Take suitable footwear, waterproofs, warm layers, food, water, a torch and emergency equipment. Plan for the least experienced person in your group and turn back if conditions exceed your skills. Snow or ice can change the walk into a winter mountaineering outing requiring appropriate equipment and experience. In a mountain emergency, call 999, ask for Police, then Mountain Rescue. Eryri safety advice

Geology, name and conservation

“Y Garn” is usually translated as “The Cairn”. The surrounding Cwm Idwal landscape contains Ordovician sedimentary and volcanic rocks, subsequently altered, folded and shaped by glaciation. Name explanation · Cwm Idwal geology

Y Garn’s summit is included in Cwm Idwal National Nature Reserve, designated in 1954. Follow reserve notices: keep dogs on a short lead, take litter home, and do not camp, light fires or fly drones. The National Trust asks visitors to stay out of Llyn Idwal, Llyn Clyd, Llyn Bochlwyd and Llyn y Cwn to protect their sensitive ecosystems. Use an established campsite for an overnight stay. National Trust reserve guidance