Llyn Idwal into Llyn Idwal from around Cwm Idwal. One small river flows out and joins the Afon Ogwen river at Pont Pen-y-Benglog near Ogwen Cottage, immediately above the Rhaeadr Ogwen waterfall. The lake is easily accessible on foot via a 900-metre long stone-paved path from Ogwen Cottage on the main A5 road. Another path encircles the lake. Two paths lead from opposite sides of the lake to the top of the ridge close to the Twll Du (Devil's Kitchen), but these paths become rather steep in places. They lead to Glyder Fach and Glyder Fawr. There is a small pebble beach
Snowdonia the national park covers an area more than twice that size extending far to the south into . This is apparent in books published prior to 1951, such as the classic travelogue "Wild Wales" by George Borrow (1862) and "The Mountains of Snowdonia" by H. Carr & G. Lister (1925). F. J. North, as editor of the book "Snowdonia" (1949), states "When the Committee delineated provisional boundaries, they included areas some distance beyond Snowdonia proper." The traditional Snowdonia thus includes the ranges of Snowdon and its satellites, the , the and the group. It does not include the hills to