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 during the event WYE FLOAT, opened by former Olympic ski jumper Eddie the Eagle. The Environment Agency is the navigation authority for the river. The Normal Tidal Limit (NTL) of the river is Bigsweir and navigation below this point is under the control of the Gloucester Harbour Trustees as Competent Harbour Authority. There is a public right of navigation downstream from Hay-on-Wye. Canoes are generally permitted at and downstream of Glasbury, so long as they do not disturb anglers. The River Wye provides for canoeing and kayaking as it has sections suitable for all ranges of skills and free access