Afon Eigiau

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 Llithrig y Wrach is a mountain peak in Snowdonia, Wales. It is one of the four Marilyns that make up the Carneddau range. To the east is Creigiau Gleision, another Marilyn, while to the west is Pen yr Helgi Du and Carnedd Llewelyn. Craig Eigiau and Llyn Eigiau can be seen to the north, while Gallt yr Ogof, Glyder Fach and Tryfan can be viewed to the south. It has one of the more colourful names of any British mountain, translating as slippery peak of the witch, perhaps in reference to the boggy conditions underfoot, or because of the resemblance of its pointed profile to an archetypal witch's hat. It is an outlier of the Carneddau, the higher peaks of which can be reached from Pen Llithrig y Wrach via Pen yr Helgi Du. On its eastern side, the mountain slopes steeply down to Llyn Cowlyd. It may be climbed from the southern side, from Capel Curig or the A5, or from the north-east, from Dolgarrog or Tal-y-bont in the Conwy valley. It is quite prominent when viewed from the north near Llandudno.

Afon Melynllyn is the outflow from Llyn Melynllyn, a lake in the Carneddau mountains in north-west Wales. It is a tributary of Afon Dulyn, itself a tributary of the river Conwy.

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.

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.

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.

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.

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.

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.

Llyn Dulyn (Welsh: black lake) is a lake on the edge of the Carneddau range of mountains in Snowdonia, North Wales. The lake is 33 acres (130,000 m2) in extent and 189 feet (58 metres) deep. Less than a kilometre to its south lies the smaller Llyn Melynllyn. Cliffs rise steeply from the lake edge up to the summits of Garnedd Uchaf and Foel Grach, giving it a dark brooding appearance - hence its name. The lake was dammed in 1881, to increase its capacity, and was significantly altered in 1931 by Llandudno Waterworks.As a reservoir Dulyn (along with Melynllyn) provided water for the town of Llandudno. The reservoir was repurposed in 1997 for use as hydroelectric generation. The outflow from the lake, the Afon Dulyn, also feeds water into neighbouring Llyn Eigiau. Afon Dulyn flows north-east, passing Tal-y-bont before joining the River Conwy. The cwm has been the site of a number of aeroplane crashes including that of an American Dakota aircraft which crashed into the cliffs above the lake in 1944 killing all four crew.

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).

Moel Eilio (not to be confused with Moel Eilio near Snowdon), is a 546-metre (1,791 ft) hill in the eastern Carneddau of northern Wales. It looks very prominent on the approach from the north towards Llanrwst along the Conwy Valley.