from the south; another possibility is to approach it from the east along the ridge from Glyder Fach. Although there is much shattered stone near the summit of Glyder Fach, the ridge between the two summits is fairly level and easy going. A scrambling, circuit route encompasses the three summits of Tryfan, Glyder Fach and Glyder Fawr and takes six or seven hours. One of the most popular routes from Ogwen Cottage follows the shore of Llyn Idwal to the base of the famous Rhiwiau Caws (Idwal Slabs) rock climbing crag, it then makes its way out of the cwm via the steep Twll Du path, arriving at a small lake called Llyn Y Cŵn. From here a steep scree path ascends the western shoulder to the summit of Glyder Fawr. Management The National Trust took over the management of the Glyderau and the Carneddau in 1951 in lieu of death duties on the Penrhyn Estate. The total area is about 7,000 hectares, half of which is common land with registered grazing rights for 45,000 sheep and 741 ponies. There are eight tenanted farms on the estate, and the National Trust is responsible for the maintenance of footpaths and drystone walls, some of which date back many hundreds of years. The two mountain ranges form part of the Snowdonia National Park. References External links Computer generated summit panoramas North South Index Walking Route up Glyder Fawr via Tryfan Walk Eryri www.geograph.co.uk : photos of Glyder Fawr Hewitts of Wales Marilyns of Wales Nuttalls Mountains and hills of Snowdonia Tourism in Gwynedd Mountains and hills of Conwy County Borough Landmarks in Wales Furths Mountains and hills of Gwynedd Capel Curig Llanberis Llandygai One-thousanders of Wales