Glasgwm via Cwm Cywarch

Glasgwm via Cwm Cywarch

Page Type Page Type: Route
Location Lat/Lon: 52.76094°N / 3.72439°W
Additional Information Route Type: Hiking
Additional Information Time Required: Half a day
Additional Information Difficulty: Just Hiking
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This is probably the shortest and most interesting hiking route to the summit of Glasgwm. It begins, where many of the trails for the Arans begin, at the Fawnog Fawr car park (SH 854 182) in Cwm Cywarch just below the mountains best feature – Craig Cywarch. The route follows the valley up to the pass between Glaswm and Aran Fawddwy, before following the line of the Aran Ridge to the mountain’s rounded summit. Although the mountain isn’t really much of a prospect for most hikers, this route is really quite nice and shows off the best Glasgwm has to offer.

Getting There

To reach the trailhead turn off the A470, which runs between Dolgellau (SH 729 181) in the west and Machynlleth (SH 748 008) in the south-east, at Dinas Mawddwy (SH 858 148) and take the road towards Aber-Cywarch (SH 867 157). Just after you cross the bridge at Aber-Cywarch turn left up an unclassified road signposted for Cwm Cywarch. Follow the road, which is narrow and winding, until you reach the parking area at Fawnog Fawr (SH 854 182). The route begins here.

Craig Cywarch
Craig Cywarch (Photo by Nanuls)

Route Description

Leave the car-park by following the road north until it terminates at Blaencywarch Farm (SH 852 159). From here continue north along the footpath which gradually turns to the left along the north-eastern slope of Craig Cywarch. The path follows the contours of the valley, and after around a kilometre crosses a stream by a concrete footbridge. As you walk up the valley you will pass along the northern crags of Craig Cywarch, which terminate at the head of the valley. The path then follows the stream up the valley, and eventually, near the valley’s head, it crosses back over the stream. From here there gradient eases and the path follows a fence to the head of the pass and another fence which runs across the spine of the Aran Ridge. You will know you’re in the right place if you have just bypassed a small pond and the boggy ground that surrounds it. At the fence junction turn left, and follow the fence (the one which runs the length of the Arans) that leads up the northern slope of Glasgwm. The summit area is characterised by a couple of small lakes and is marked by a small cairn.

Upper Cwm CywarchUpper Cwm Cywarch (Photo by Nanuls)
Bridge in Cwm CywarchThe footbridge (Photo by JoeHarris)
GlasgwmSummit of Glasgwm (Photo by JoeHarris)

Essential Gear

Naturally you will need all the paraphernalia associated with hill walking in Wales: full waterproofs, fleece, hat, gloves, map, compass and of course some lunch.


Open Space Web-Map builder Code
Navigation Maps

Ordnance Suvey 1:25k Explorer Series OL 23 Cadair Idris & Bala Lake / Llyn Tegid

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

Harvey Map Services 1:25k Snowdonia Aran

Harvey Map Services/BMC 1:40k British Mountain Map Snowdonia South

Road Maps

Ordnance Survey Tour Series 10 North and Mid Wales


External Links

Cwm Cywarch with a bit of snowUpper Cwm Cywarch (Photo by Nanuls)
GlasgwmDon't know if it's still there, but this was on the trail to the summit (Photo by JoeHarris
Craig CywarchCraig Cywarch (Photo by Nanuls)
Craig CywarchCraig Cywarch (Photo by JoeHarris)

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



Parents refers to a larger category under which an object falls. For example, theAconcagua mountain page has the 'Aconcagua Group' and the 'Seven Summits' asparents and is a parent itself to many routes, photos, and Trip Reports.