Sarn Helen

Sarn Helen is a Roman road network extending roughly 160 miles from Carmarthen in the south to Aberconwy in the north, crossing mountains, valleys, and moorlands throughout Wales. Sections of the original route remain walkable and accessible for modern travelers exploring the landscape.

Roman engineers built this road system during the first century CE to link military posts and enable troop movements across Wales. The construction followed Roman building methods to make difficult terrain passable.

The name merges the Welsh word 'sarn' meaning causeway with 'Helen,' possibly named after Saint Elen of Caernarfon from medieval Welsh traditions. This connection to local identity remains visible as you follow the ancient path through the landscape.

Several sections of the original road are accessible for hiking and mountain biking, with a long-distance trail following parts of the ancient route. Sturdy footwear and weather protection are wise as the terrain is uneven and conditions can be exposed.

The route passes near Dolaucothi Gold Mines, which Romans operated in the first century and where they created an extensive network of underground tunnels and waterways. These workings represented a valuable resource within the broader Roman operations in the region.