The Pennine Way is a National Trail in England, with a small section in Scotland. The trail runs 429km from Edale, in the northern Derbyshire Peak District, north through the Yorkshire Dales and the Northumberland National Park and ends at Kirk Yetholm, just inside the Scottish border. The path runs along the Pennine hills, sometimes described as the "backbone of England". Although not the United Kingdom's longest National Trail it is according to the Ramblers' Association "one of Britain's best known and toughest".