The North York Moors is an upland area in north-eastern Yorkshire, England. It contains one of the largest expanses of heather moorland in the United Kingdom. The area was designated as a National Park in 1952, through the National Parks and Access to the Countryside Act 1949. Covering an area of 554 sq mi (1,430 km2), the National Park has a population of 23,380. It is administered by the North York Moors National Park Authority, which is based in Helmsley. In 2025, a serious fire started on Langdale Moor and it was estimated that it could take over a decade for the heather to develop to the previous depth.