The Trans Cambrian Way is one of the great classic mountain biking routes of Wales, cutting a wild, west-bound line across the country from the English border to the Irish Sea. Starting in the market town of Knighton and finishing at Dyfi Junction near Machynlleth, the route covers around 175km (108 miles) and climbs an estimated 4,000 metres over its length, taking riders up and over the Cambrian Mountains, widely considered the oldest mountain range in Europe. It is a serious undertaking, usually tackled over three to four days, but it rewards every ounce of effort with some of the emptiest, most unspoilt riding country Wales has to offer.
What sets the Trans Cambrian Way apart is its sheer remoteness. Much of the route crosses high, rolling moorland and grassy hill country where habitations are few and far between, phone signal disappears for hours at a time, and a day’s ride might bring you into contact with little more than the odd hill farmer and a great many sheep. The terrain itself is wonderfully varied, taking in grassy bridleways, rocky singletrack, ancient ridge roads, forest tracks and the occasional river to ford, all set against the backdrop of the Cambrian Mountains’ broad, empty skylines.
The route passes close to the Elan Valley, home to a chain of dramatic Victorian reservoirs built to supply water to Birmingham, their dams and towers now considered masterpieces of Victorian engineering set within a landscape of outstanding natural beauty. This part of mid Wales is also closely associated with the red kite, a bird of prey brought back from the brink of extinction in Britain through a conservation effort centred on this very area, and one that riders can expect to see wheeling overhead throughout the trip.
History surfaces often along the way, from the old lead-mining country around Cwmystwyth, once one of the most productive mining areas in Wales, to the slate memorial viewpoint dedicated to the broadcaster Wynford Vaughan-Thomas above Machynlleth, marking one of the finest views of the entire route. The trail eventually descends towards the Dyfi estuary and the ancient town of Machynlleth, once the seat of Owain Glyndŵr’s parliament, bringing the journey full circle from the rolling border hills of Knighton to the edge of the sea.
For those looking for an even bigger challenge, the Trans Cambrian Way connects neatly with the newer Traws Eryri trail, which continues north from Machynlleth through Eryri National Park to Conwy, allowing experienced riders to combine the two into a single, epic border-to-coast crossing of Wales. Whether ridden alone or as part of that longer journey, the Trans Cambrian Way stands as one of the finest tests of off-road riding in the country, a genuine adventure through landscapes that remain wonderfully wild.
Our Trans Cambrian Way mountain biking holiday takes you the full distance from Knighton to Machynlleth, with all the logistics arranged so you can focus on the ride ahead. We offer both self-guided trips, with route notes, GPX files and pre-booked accommodation each night, and guided departures led by an experienced local guide with full support vehicle back-up. Daily luggage transfer between overnight stops is included, so there is no need to ride with anything more than a day pack, and quality mountain bikes, including e-MTBs for those wanting a little extra support on the bigger climbing days, are available to hire. Given the remote nature of the route, we strongly recommend a good level of fitness and off-road riding experience before taking this one on.
Day 1: Arrive in Knighton Make your own way to Knighton, a historic market town on the England-Wales border and the starting point for the Trans Cambrian Way. Settle in for the night ready for an early start.
Day 2: Knighton to Rhayader Approx. 30 miles / 48km A gentle start through Knucklas gives way to the first real climb of the trip up onto Beacon Hill, with fine views back towards the border country. Ridge roads and open moorland lead you on towards Rhayader, gateway to the Elan Valley and its famous reservoirs.
Day 3: Rhayader to Pontrhydfendigaid Approx. 27 miles / 43km Skirting the edge of the Elan Valley, today’s ride climbs into wilder, more remote country, with a good chance of spotting red kites overhead. The trail continues over high moorland before dropping down to the small village of Pontrhydfendigaid.
Day 4: Pontrhydfendigaid to Cwmystwyth Approx. 29 miles / 47km The route climbs steadily through old lead-mining country around Cwmystwyth, once one of the busiest mining areas in Wales, with plenty of industrial remains to spot along the way. This is one of the most remote sections of the entire route, so make the most of the solitude.
Day 5: Cwmystwyth to Machynlleth Approx. 20 miles / 32km A final climb brings you to the highest point of the day’s route, with the Cadair Idris range coming into view ahead. The Wynford Vaughan-Thomas memorial viewpoint offers one of the finest panoramas of the trip before a long descent takes you down to Machynlleth and the Dyfi estuary, journey’s end.
Day 6: Depart Enjoy a final morning in Machynlleth, Wales’ historic former capital, before making your way home, or continue north to take on the Traws Eryri trail for an even bigger Welsh adventure.
(Itinerary shown as an example – stages, mileage and overnight stops can be adjusted to suit riding ability and available time.)
