Hay-on-Wye in Hay is a sub-office of Hereford, and therefore although in Wales has an English postal address, being part of the HR3 postcode. Hay-on-Wye is a Welsh community with a Town Council. Its boundary follows the English border/Dulas Brook from the River Wye southeastwards for just over a kilometre, turns south-west to a point just south of Oakfield house, thence north to Greenpit Farm and north westwards, enclosing the Hay Showground and meeting the National Park boundary near the B4350, Brecon Road. From this point, it follows the National Park boundary to the River Wye and the river back to
River Wye to the extensive habitat improvement work carried out by the Wye and Usk Foundation, set up to restore the spring salmon runs. In 2015 the five-year average once again climbed above 1,000 and it is now the third best salmon river in England and Wales, surpassed only by the Tyne and Wear. The Wye was particularly famous for its large "spring" salmon that had spent three or more years at sea before returning to spawn. They used to enter the river between January and June and sometimes reached weights of over , the largest recorded being landed after a long