Mount Pelier Hill (Irish: Cnoc Mount Pelier) is a 383-metre (1,257-foot) hill in County Dublin, Ireland. It is commonly referred to as the Hell Fire Club (Irish: Club Thine Ifreann), 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.