1992. Severn Way The Severn Way runs for 210 miles (337 km) along the River Severn between the mouth of the Severn at Bristol, England, and its source at Plynlimon, Wales. References External links Computer generated summit panoramas Plynlimon index THE PUMLUMON PROJECT, Montgomeryshire Wildlife Trust www.geograph.co.uk ; photos of Plynlimon and surrounding area Mountains and hills of Ceredigion Hewitts of Wales Marilyns of Wales Nuttalls Elenydd Sites of Special Scientific Interest in Ceredigion