Pembrokeshire plays in WRU Division One West. Triathlon event "Ironman Wales" has been held in Pembrokeshire since 2011, contributing £3.7 million to the local economy, and the county committed in 2017 to host the event for a further five years. "Ras Beca", a mixed road, fell and cross country race attracting UK-wide competitors, has been held in the Preseli Hills annually since 1977. The record of 32 minutes 5 seconds has stood since 1995. Pembrokeshire Harriers athletics club was formed in 2001 by the amalgamation of Cleddau Athletic Club (established 1970) and Preseli Harriers (1989) and is based in Haverfordwest. The
Pembrokeshire landscape was subject to considerable change as a result of ice ages; about 20,000 years ago the area was scraped clean of soil and vegetation by the ice sheet; subsequently, meltwater deepened the existing river valleys. While Pembrokeshire is not usually a seismically active area, in August 1892 there was a series of pronounced activities (maximum intensity: 7) over a six-day period. The Pembrokeshire coastline includes numerous bays and sandy beaches. The Pembrokeshire Coast National Park, the only park in the UK established primarily because of its coastline, occupies more than a third of the county. The park contains the