What river joins England and Wales how long is it?

Length: Around 135 miles (220 km)

The River Wye is approximately 135 miles long and forms part of the border between England and Wales. It is the fifth-longest river in the UK and is known for its beautiful scenery and abundant wildlife. The river rises at Plynlimon in Mid Wales and flows through the counties of Powys, Herefordshire, and Monmouthshire in Wales, before entering Gloucestershire in England and eventually meeting the River Severn at Chepstow.