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 have developed along the Milford Haven Waterway and the county has attracted other major ventures. In 2016, the Rt. Hon. Stephen Crabb, then Welsh Secretary, commented in a government press release: ""...with a buoyant local economy, Pembrokeshire is punching above its weight across the UK."" Until the 12th century, a great extent of Pembrokeshire was virgin woodland. Clearance in the lowland south began under Anglo-Flemish colonisation and under mediaeval tenancies in other areas. Such was the extent of development that by the 16th century there was a shortage of timber in the county. Little is known about mediaeval farming methods,