Pen Hill forms part of the Mendip Hills plateau in Somerset, England. The hill is located in St Cuthbert Out civil parish in Mendip district. The name Pen is believed to be Celtic for hill or tor. It gives its name to one of the four periclines which underlay the geology of the hills. There are ancient remains on the hill, in the form of a neolithic Long barrow, which has been listed as Scheduled Ancient Monument, and a post medieval pillow mound thought to have been built specifically for rabbit breeding.