Castlemartin, Pembrokeshire Castlemartin, Pembrokeshire Castlemartin () is a village in (and giving its name to) the Castlemartin Hundred, Pembrokeshire, Wales. It is part of the community of Stackpole and Castlemartin, after amalgamating with Stackpole in 2012, within the Pembrokeshire Coast National Park. The village is on a sandstone ridge, southwest of Pembroke, southeast of Angle, and reached on the B4319 road. In chronostratigraphy, the British sub-stage of the Carboniferous period, the 'Arundian' derives its name from Hobbyhorse Bay in the Castlemartin community"arundo" being the Latin for hobby horse. The village, once centred on a prominent Norman motte-and-bailey castle, together with the original
Pembrokeshire features was a key factor in the establishment of the Pembrokeshire Coast National Park and a number of sites of special scientific interest (SSSIs). In the north of the county are the Preseli Hills, a wide stretch of high moorland supporting sheep farming and some forestry, with many prehistoric sites and the probable source of the bluestones used in the construction of the inner circle of Stonehenge in England. The highest point is Foel Cwmcerwyn at , which is also the highest point in Pembrokeshire. Elsewhere in the county most of the land (86 per cent according to CORINE) is