Ingleborough (723 m or 2,372 ft) is the second-highest mountain in the Yorkshire Dales, England.
It is one of the Yorkshire Three Peaks (the other two being Whernside and Pen-y-ghent), and is frequently climbed as part of the Three Peaks walk. A large part of Ingleborough is designated as a Site of Special Scientific Interest and National Nature Reserve and is the home of a new joint project, Wild Ingleborough, with aims to improve the landscape for wildlife and people.
The first element of the name "Ingleborough" has been variably explained as a Scots term for 'beacon, fire', an Old Danish term meaning 'English' or a derivative of Old English ing, 'peak'. The second element is derived from the Old English word burh, meaning "a fortified place"; in this case, a hill fort. The summit plateau of Ingleborough is encircled by the remains of a massive stone rampart, containing the foundations of Iron Age huts.