Mount Pelier Hill (Irish: Cnoc Mount Pelier)[2] is a 383-metre (1,257-foot) hill in County Dublin, Ireland.[1] It is commonly referred to as the Hell Fire Club (Irish: Club Thine Ifrinn),[3] the popular name given to the ruined building at the summit. This building – a hunting lodge built in around 1725 by William Conolly – was originally called Mount Pelier and since its construction the hill has also gone by the same name.[4] The building and hill were respectively known locally as 'The Brass Castle'[5] and 'Bevan's Hill'[6], but the original Irish name of the hill is no longer known although the historian and archaeologist Patrick Healy has suggested that the hill is the place known as Suide Uí Ceallaig or Suidi Celi in the Crede Mihi, the twelfth century diocesan register book of the Archbishops of Dublin.[7]

Mount Pelier is the closest to Dublin city of the group of mountains – along with Killakee, Featherbed Bog, Kippure, Seefingan, Corrig, Seahan, Ballymorefinn, Carrigeenoura and Slievenabawnogue – that form the ridge that bounds the Glenasmole valley.[8] On the slopes is a forestry plantation, known as Hell Fire Wood, which consists of Sitka spruce, larch and beech.[9]

Originally there was a cairn with a prehistoric passage grave on the summit. Stones from the cairn were taken and used in the construction of Mount Pelier lodge. Shortly after completion, a storm blew the roof off. Local superstition attributed this incident to the work of the Devil, a punishment for interfering with the cairn.[citation needed] Mount Pelier Hill has since become associated with numerous paranormal events.