Pen Llithrig y Wrach

Llyn Cowlyd is the deepest lake in northern Wales. It lies in the Snowdonia National Park at the upper end of Cwm Cowlyd on the south-eastern edge of the Carneddau range of mountains, at a height of 1,164 feet (355 m) above sea level. The lake is long and narrow, measuring nearly 2 miles (3 km) long and about a third of a mile (500 m) wide, and covers an area of 269 acres (1.1 km2). It has a mean depth of 109 feet (33 m) and at its deepest has given soundings of 229 feet (70 m), this being some 45 ft (14 m) greater than its natural depth, the water surface having been raised twice by the building of dams.The surrounding hills drop steeply to the water's edge, from Cefn Cyfarwydd and Creigiau Gleision to the east, and Pen Llithrig y Wrach to the west, and as a consequence have not been forested in the 20th century, as were the slopes of neighbouring Llyn Crafnant. Indeed, there is not a tree to be seen, and the general aspect is one of bleakness. Dependent on the weather conditions, the waters often appear dark. The supply of water to Llyn Cowlyd is assisted at its south-western end by a leat which runs roughly east–west along the 1370-foot contour to the south and west of the lake, along the Llugwy valley. It is also fed by water from Llyn Eigiau. Llyn Cowlyd can be reached by road from Trefriw, some 3 miles (5 km) to the east, although the metalled road stops at a gate, the best part of a mile from the lake itself, beyond which private vehicles are not permitted. Llyn Cowlyd can also be reached by foot from Capel Curig, some 2 miles (3 km) away, from the ridge of Cefn Cyfarwydd, or from above Dolgarrog. A good path runs along the north-western shore of the lake. The stream which flows from Llyn Cowlyd is called Afon Ddu. This flows into the river Conwy, passing Pont Dolgarrog on the B5106 road, just south of the village of Dolgarrog. The gorge cut by the river at this point is popular for gorge walking.

Creigiau Gleision is a mountain in Snowdonia, Wales, near Capel Curig. It is the easternmost of the high Carneddau and is separated from the others by Llyn Cowlyd. Directly across this reservoir from Creigiau Gleision is Pen Llithrig y Wrach. To the north-east it runs into the broad ridge of Cefn Cyfarwydd.Creigiau Gleision affords splendid views in all directions, including northwards to the coast, and down the Ogwen Valley and Dyffryn Mymbyr towards Snowdon. In fact the mountain has three peaks, hence perhaps its plural name. The most southerly peak is the highest, at 678 metres (2,224 ft), and the O.S. map also marks the northerly peak (some ½ mile distant) at 634 metres (2,080 ft). Between these two lie a middle peak, of a height between the outer two, but cairnless and unmarked on the O.S. map. Colin Adams, author of The Mountain Walker's Guide to Wales (Gwasg Carreg Gwalch, 2002), has reached the summit of Creigiau Gleision over 450 times. He claims that on many occasions he encountered a ghost there who has spoken to him, and although he makes no reference to this in his book, he wrote about it in 1999.

Afon Eigiau is a small river in the Carneddau mountains in Snowdonia, in north-west Wales, which flows down Cwm Eigiau and into Llyn Eigiau.It is fed by smaller streams which flow down the slopes of neighbouring Foel Grach, Carnedd Llywelyn and Pen yr Helgi Du.

Craiglwyn is a top of Creigiau Gleision in Snowdonia, Wales, near Capel Curig. It lies at the south end of the Creigiau Gleision ridge, and offers good views of Carnedd Dafydd, Pen yr Helgi Du, Pen Llithrig y Wrach, Gallt yr Ogof, Tryfan and Moel Siabod.

Creigiau Gleision North Top is a mountain in Snowdonia, Wales, near Capel Curig. It is a significant top on the Creigiau Gleision ridge, topping the north end of its crest. Views of Carnedd Llewelyn are better from this summit compared to the main Creigiau Gleision summit, due to less shielding from Pen Llithrig y Wrach.

Llyn Eigiau is a lake on the edge of the Carneddau range of mountains in Snowdonia, Conwy, Wales. The name Eigiau is thought to refer to the shoals of fish which once lived here. Early maps refer to it as Llynyga. It is thought that a small number of Arctic char exist in the lake (as they do in neighbouring Llyn Cowlyd) after they were transferred here from Llyn Peris, and certainly it is one of the few lakes in Wales to have its own natural brown trout. The lake is surrounded by mountains including Pen Llithrig y Wrach.

Pen yr Helgi Du (Head or Hill of the Black Hound) is a mountain peak in the eastern part of the Carneddau in Snowdonia, Wales. It lies on the south-eastern flanks of Carnedd Llewelyn, and is linked to Carnedd Llewelyn over the col of Bwlch Eryl Farchog, a knife-edge ridge over the cliffs of Craig Yr Ysfa. From here the walker can drop down into Cwm Eigiau to the east or to the Ffynnon Llugwy reservoir to the south. Continuing over Pen yr Helgi Du to the east you will reach the even more beautifully named Pen Llithrig y Wrach (the slippery peak of the witch).

Ffynnon Llugwy (English: Llugwy spring) is a lake in the Carneddau range of mountains in Snowdonia, North Wales. It lies at a height of about 1,786 feet (544 m) and covers an area of some 40 acres (16.19 ha). It has a maximum depth of 146 ft (45 m).Since the early twentieth century water has been taken from its outflow, Afon Llugwy to feed Llyn Cowlyd via a series of leats. Since the mid 1970s the lake has additionally acted as a reservoir for Bangor and eastern Anglesey, which necessitated the laying of an 11-mile pipeline to the water treatment works at Mynydd Llandegai.It is the source of the River Llugwy (Welsh: Afon Llugwy) which flows via Capel Curig and Betws-y-coed before becoming a tributary of the River Conwy.

The Cowlyd Tramway was a 2 ft (610 mm) narrow gauge railway line used to convey men and materials to Llyn Cowlyd Reservoir, near Trefriw in northern Wales during the enlargement of the dam, and thereafter for maintenance purposes.

Llyn Melynllyn (Welsh for yellow lake) is a lake within the Carneddau range of mountains in Snowdonia, North Wales. It lies at a height of just over 2,000 feet (610 m), and has an area of some 18.5 acres (75,000 m2). Cliffs rise steeply from its western edge, up to the summit of Foel Grach, and down from which most of its feeder streams flow. A small dam was built at its northern end in 1887, but this was deliberately breached in 1970. The lake acts as a reservoir for the Llandudno area. Less than a kilometre to its north lies the larger Llyn Dulyn. The outflow from the lake is called Afon Melynllyn, this stream flowing north-east to join Afon Dulyn, itself a tributary of the river Conwy.

Capel Curig (Welsh pronunciation: [ˈkɑːpɛl ˈkɨːrɪɡ]; meaning "Curig's Chapel") is a village and community in Conwy County Borough, Wales. Historically in Caernarfonshire, it lies in the heart of Snowdonia, on the River Llugwy, and has a population of 226, reducing slightly to 206 at the 2011 census. It lies at the junction of the A5 road from Bangor and Bethesda to Betws-y-Coed with the A4086 road from Caernarfon, Llanberis, Pen-y-Pass and Pen-y-Gwryd. It is surrounded by hills and mountains, including Moel Siabod and Pen Llithrig y Wrach.

Plas y Brenin, located in Conwy County Borough, Wales, is a National Outdoor Centre owned by Sport England. The centre is situated in Dyffryn Mymbyr, the Mymbyr Valley, in Snowdonia and is less than a quarter of a mile south-west of the centre of Capel Curig on the A4086 road.