The Welsh Highland Railway is one of those rare lines that feels as much like a living storybook as a working railway. Winding through the mountains of North Wales, it connects coast to upland in a way that feels both practical and quietly epic, especially on the stretch from Caernarfon to Beddgelert, where castle walls give way to forests, rivers, and deep glacial valleys.
Today, the railway exists thanks largely to the work of the Ffestiniog and Welsh Highland Railways Trust, the charitable organisation that safeguards the heritage, rolling stock, infrastructure, and long-term future of both the Ffestiniog Railway and the Welsh Highland Railway. Together, these two railways form a unique narrow-gauge network, blending Victorian engineering with modern heritage operation. While the Ffestiniog Railway is the elder sibling, famous for its slate-hauling origins, the Welsh Highland Railway is the wild, scenic cousin that pushes deeper into the mountains.
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A journey typically begins at Caernarfon, a town already heavy with history before you even reach the platform. The great stone bulk of Caernarfon Castle looms over the harbour, and from the station the tracks point south, threading away from the sea and into the heart of Eryri. For many visitors, this station is not just a place to board a train, but a gateway into a different rhythm of travel, where time slows to the pace of steam.
One of the most popular services on the line is the Gelert Explorer, known in Welsh as Fforiwr Gelert. The name references the legendary hound Gelert, whose story is tied to nearby Beddgelert, the village that marks the midpoint of many journeys. The Gelert Explorer is not about rushing; it is about lingering. The train pauses, whistles, and breathes its way through the countryside, offering long views of lakes, forests, and the rising slopes of Snowdon.
Powering these trains is a collection of historic locomotives, but few capture the imagination like NG15 No.134. Originally built for hard service in southern Africa, this locomotive represents a fascinating layer of railway history: imperial, industrial, and now lovingly preserved. On the Welsh Highland Railway, No.134 looks perfectly at home despite having been designed for a very different landscape. Its deep bark as it climbs away from Caernarfon is a sound that echoes off hillsides and across valleys, as if the railway is announcing itself to the mountains.
The line from Caernarfon to Beddgelert is often described as the most scenic section, and it is easy to see why. After leaving the town, the railway skirts the edge of the Menai Strait before turning inland, crossing marshland and farmland before the terrain tightens into rocky cuttings and wooded glens. The River Seiont runs close by for part of the route, sometimes glimpsed through gaps in the trees, sometimes hidden behind stone walls built by hand more than a century ago.
Beddgelert itself feels like a natural pause point, a village that seems designed to be approached slowly. When the Gelert Explorer draws in, steam drifting across the platform, passengers step down into a place where legend and geography are inseparable. Paths lead off toward the mountains, cafés wait just beyond the station, and the river Glaslyn murmurs past the bridges that give the village its postcard reputation.
Behind the scenes, none of this happens by accident. The Ffestiniog and Welsh Highland Railways Trust coordinates volunteers, engineers, historians, and fundraisers who keep the network alive. The Trust oversees everything from restoring rolling stock like NG15 No.134, to maintaining track across some of the most challenging terrain in Britain. The Trust also works to ensure that the Welsh language, local culture, and regional identity are not lost amid the whistles and brasswork.
What makes the pairing of the Ffestiniog Railway and the Welsh Highland Railway so compelling is how they complement each other. The Ffestiniog is intimate and historic, clinging to slate-hewn ledges between Porthmadog and Blaenau Ffestiniog. The Welsh Highland is broader, bolder, carrying trains like the Gelert Explorer across long distances and big landscapes. Together they form a coherent story of narrow-gauge survival, revival, and reinvention.