Afon Colwyn

Clogwyn is an intermediate station on the Snowdon Mountain Railway. It is located on an exposed ridge overlooking the Llanberis Pass and Clogwyn Du'r Arddu cliffs, a popular climbing spot. The line starts in the valley bottom at Llanberis at an altitude of 353 ft (108 m), Clogwyn station stands at 2,556 ft (779 m).The summit station stands at 3,493 feet (1,065 m), 68 feet (21 metres) below the summit of the mountain. The station opened with the railway on 6 April 1896, but both closed the same day following an accident. They reopened on 9 April 1897 without mishap and have operated since except during wartime. The station has one platform.

The Snowdon Massif or Yr Wyddfa massif is one of the three mountain groups in Snowdonia (Eryri), north Wales, to include mountains over 3,000 feet (914 m) high. It occupies the area between Beddgelert, Pen-y-Pass and Llanberis. It is surrounded by the Glyderau to the north-east, Moel Siabod to the east, the Moelwynion to the south, Moel Hebog, the Nantlle Ridge and Mynydd Mawr to the west, and by flatter land leading down to Caernarfon and the Menai Strait to the north-west. The Snowdon Horseshoe is the name given to the semi-circular ring of ridges and peaks on Snowdon's (Yr Wyddfa) eastern side, i.e. facing down Dyffryn Mymbyr towards Capel Curig. The peaks in the Horseshoe are those of Y Lliwedd, Snowdon, Garnedd Ugain and Crib Goch.

Garnedd Ugain, often referred to as "Crib-y-Ddysgl", is a pyramidal mountain in Wales that forms part of the Snowdon Massif. It is the second-highest peak in Wales, and lies just under one kilometre north of the summit of Snowdon itself. It is part of the Snowdon Horseshoe route, being linked to Crib Goch via the col at Bwlch Coch, and to Snowdon summit via the col at Bwlch Glas. It is also linked to Cwm Glas to the northeast via a steep arete called Clogwyn y Person, which joins the main Crib y Ddysgl ridge about 500 metres (1,600 feet) east of the summit.

Llechog is a top of Garnedd Ugain on the Snowdon massif in Wales. It is the top of a long crest of cliffs that start in Llanberis and finishes on Garnedd Ugain. The nearby Clogwyn Station is a stop of the Snowdon mountain railway. The summit is a rocky peak sitting out from cliffs which fall steeply down to the Nant Peris valley. The viewpoint is commanding, where the full prominence of Glyder Fawr, Y Garn, Elidir Fawr and Crib Goch can be admired.A second top of the same name can also be found about 1/2 mile to the south-west of Snowdon summit, overlooking Cwm Clogwyn.

Rocky Valley Halt is an intermediate station on the Snowdon Mountain Railway. It consists of a narrow platform sheltered by the rocky outcrop of Llechog to the east. Immediately beyond the platform the line joins the exposed ridge on which it runs for about half a mile. The line starts in the valley bottom at Llanberis at an altitude of 353 ft (108 m), Rocky Valley Halt stands at 2,330 ft (710 m).The summit station stands at 3,493 feet (1,065 m), 68 feet (21 metres) below the summit of the mountain. The halt is a later addition to the line, opening after the Second World War. Trains do not normally stop at the halt, but may terminate there if Clogwyn and the summit are considered too windy. The station has one platform.

Clogwyn Du'r Arddu (Welsh pronunciation: [ˈklɔɡwɨ̞n ˈdɨːr ˈarðɨ̞], translates as the "black cliff of the black height"), or "Cloggy", is a north-facing rhyolite set of cliffs located on the northern flank of Snowdon mountain. Cloggy is considered to be one of the best traditional climbing areas in Britain, and has been called "The shrine of British climbing", and a "crucible for the development of most of the finest climbers in Britain and the scene of many of their finest achievements".

Indian Face is a 45-metre (148 ft) rhyolite rock climbing route on the "Great Wall" of the East Buttress of Clogwyn Du'r Arddu, in Wales. When English climber Johnny Dawes completed the first free ascent of the route on 4 October 1986, it was graded E9 6c (5.13a X), the first-ever E9-graded route, and was considered one of the hardest traditional climbing routes in the world.Indian Face is still considered one of the world's most intimidating traditional climbs, and even decades after its first ascent, it is rarely repeated. The ascent was an historic moment in the transition from traditional climbing as the dominant form of extreme rock climbing (in Britain, and elsewhere), to the safer form of sport climbing, which became the main focus for the leading climbers.

The Summit railway station is the southern, upper terminus of the Snowdon Mountain Railway, located within yards of the summit of Snowdon. In 2009 a new station building was opened, which was named Hafod Eryri. The line starts in the valley bottom at Llanberis at an altitude of 353 ft (108 m). Summit station stands at 3,493 feet (1,065 m), 68 feet (21 metres) below the summit of the mountain, to which it is connected by a short stepped path.

Snowdon () or Yr Wyddfa (pronounced [ər ˈʊɨ̞̯ðva] (listen)) is the highest mountain in Wales, at an elevation of 1,085 metres (3,560 ft) above sea level, and the highest point in the British Isles outside the Scottish Highlands. It is located in Snowdonia National Park (Parc Cenedlaethol Eryri) in Gwynedd (historic county of Caernarfonshire). It is the busiest mountain in the United Kingdom and the third most visited attraction in Wales; in 2019 it was visited by 590,984 walkers, with an additional 140,000 people taking the train. It is designated as a national nature reserve for its rare flora and fauna. The rocks that form Snowdon were produced by volcanoes in the Ordovician period, and the massif has been extensively sculpted by glaciation, forming the pyramidal peak of Snowdon and the arêtes of Crib Goch and Y Lliwedd. The cliff faces on Snowdon, including Clogwyn Du'r Arddu, are significant for rock climbing, and the mountain was used by Edmund Hillary in training for the 1953 ascent of Mount Everest. The summit can be reached by a number of paths (there are six main paths) and by the Snowdon Mountain Railway, a rack railway opened in 1896 which carries passengers the 4+3⁄4 miles (7.6 kilometres) from Llanberis to the Summit station. The summit building, called Hafod Eryri, houses a cafe and is open only when the railway is operating; it opened in 2009 to replace one built in the 1930s. The railway generally operates from March to the end of October, with trains running to the summit station from May. The daily running schedule depends on weather and customer demand. Snowdon is one of three mountains climbed as part of the National Three Peaks Challenge.

Glaslyn (Welsh: Blue lake) is a lake in the Snowdonia National Park in Gwynedd, north-west Wales.

Halfway railway station is an intermediate stop on the Snowdon Mountain Railway, halfway along the line and close to the 'Halfway House' cafe on the nearby footpath. A short distance above the station is a path that leads down to the cafe. The line starts in the valley bottom at Llanberis at an altitude of 353 ft (108 m), Halfway station stands at 1,641 ft (500 m).The summit station stands at 3,493 feet (1,065 m), 68 feet (21 metres) below the summit of the mountain. The station opened with the railway on 6 April 1896, but both closed the same day following an accident. They reopened on 9 April 1897 without mishap and have operated since except during wartime. The station has one platform.

The Paddy Buckley Round, also known as the Welsh Classical Round, is a long distance fell running challenge in Snowdonia, Wales. The route is a circuit of just over 100 km long taking in some 47 summits. The Round has the reputation of being somewhat tougher to complete than its English Lake District equivalent, the Bob Graham Round. Although no official time limit is set, an arbitrary 24 hours is applied, although the first completer exceeded the original aim of 24 hours. Runners may start at any point on the circular route (finishing at the same place) and may run the course in either a clockwise or anticlockwise direction. The route takes in the well-known high mountain ranges of Snowdon, the Glyderau and the Carneddau as well as the slightly less visited ranges of Moel Siabod, the Moelwynion, Moel Hebog and the Nantlle Ridge. The route was devised by the eponymous Paddy Buckley and first completed in 1982 by Wendy Dodds. The selection of summits that must be visited is somewhat arbitrary and no rules appear to have been applied in selecting them. Generally, it takes in the major peaks of the ranges that are being crossed, then any minor tops that are passed along the way are also included. Some of these tops really are just bumps on the ridge and not really summits in their own right at all. The fastest known completion of the round was, for many years, by Mark Hartell in 18 hours 10 minutes. On 4 May 2008, this time was matched by Chris Near of Eryri Harriers. This old record was broken in July 2009 by Tim Higginbottom who completed the Round in a time of 17 hours and 42 minutes. This was further reduced in 2019 by Damian Hall with 17 hours 31 minutes, and again on 30 August 2020 by Matthew Roberts with a time of 16 hours 38 minutes. Kim Collison set a new best time of 16 hours 20 minutes in April 2021. A year later, in April 2022, a new record was set by Finlay Wild who completed the round solo and unsupported in a time of 15 hours 14 minutes.The women's record is held by Jasmin Paris with a time of 18 hours and 33 minutes, set in 2016.The book "The Welsh Three Thousand Foot Challenges: A Guide for Walkers and Hill Runners" describes a version of the route which avoids the slate quarries, which the fastest line utilises, and also suggests attempting it as a four-day backpacking (lightweight camping) excursion rather than a one-day run.