Wensleydale is a valley in North Yorkshire, England. It is one of the Yorkshire Dales, which are part of the Pennines. The dale is named after the village of Wensley, formerly the valley's market town. The principal river of the valley is the Ure, which is the source of the alternative name Yoredale. The majority of the dale is within the Yorkshire Dales National Park; the part below East Witton is within the national landscape of Nidderdale.