The River Wye: England–Wales Border River, 135 Miles Long

The River Wye forms a significant stretch of the border between England and Wales. It runs approximately 135 miles (220 km), making it the UK's fifth-longest river.

Rising at Plynlimon in mid-Wales, the Wye flows through Powys, Herefordshire, and Monmouthshire before crossing into Gloucestershire, England, and joining the River Severn at Chepstow. Its scenic valley is renowned for wildlife, limestone gorges, and recreational paddling.