Phoenix Park (Irish: Páirc an Fhionnuisce) is an urban park in Dublin, Ireland, lying 2–4 km west of the city centre, north of the River Liffey. Its 11 km perimeter wall encloses 707 hectares (1,750 acres), one of the largest walled city parks in Europe. It includes large areas of grassland and tree-lined avenues, and since the seventeenth century has been home to a herd of wild Fallow deer. The English name comes from the Irish fionn uisce meaning "clear water". The Irish Government is presently lobbying UNESCO to have the park designated as a world heritage site.
Motor racing first took place in the Phoenix Park in 1903 when the Irish Gordon Bennett Race Speed Trials were held on the main straight for both cars and motorcycles. This was followed in 1929 by the Irish International Grand Prix; the first of three Irish motor racing grands prix. Racing took place between 1932 until the beginning of World War II in 1939 and was revived again in 1949 with a sprint on the Oldtown circuit followed the next year by a full racing meeting again and has been used virtually continuously until today. Over the years seven different circuits have been used, two of which are named after the famous Ferrari World Champion racing driver Mike Hawthorn.
The Great Ireland Run, a 10 km running competition, has been held annually each April in Phoenix Park since 2003. It includes races for professional runners and the public and the 2010 edition attracted over 11,000 participants. Athletes such as Sonia O'Sullivan and Catherina McKiernan are among the race's past winners.
Music concerts have been performed in the park by such acts as Coldplay, Duran Duran, Robbie Williams, Red Hot Chili Peppers, Ian Brown, Justice, Kanye West, Arcade Fire, Tom Waits, Snow Patrol, Florence and the Machine and The Stone Roses.