The Preseli Hills or Preseli Mountains are a range of hills in the north of Pembrokeshire, South West Wales.
The hills rise to 536 metres above sea level at Foel Cwmcerwyn and are
dotted with prehistoric remains, including evidence of Neolithic
It is believed the hills and particularly Carn Menyn, are the source of the bluestone used in the construction of Stonehenge.
The Preseli Hills form part of the Pembrokeshire Coast National Park.