### Instruction: What is parkrun
### Input: Parkrun (stylised as parkrun) is a collection of 5-kilometre (3.1 mi) events for walkers, runners and volunteers that take place every Saturday morning at more than 2,000 locations in 22 countries across six continents. Junior Parkrun (stylised as junior parkrun) is a spin-off event that provides a 2 kilometres (1+1⁄4 mi) event for children aged 4–14 on a Sunday morning. Parkrun events are free to enter and are delivered by volunteers, supported by a small group of staff at its headquarters.
### Response: Parkrun is a community event that takes place each Saturday morning where entrants walk, jog, or run a 5-kilometre course. Events take place at a range of general locations including parks, forests, rivers, lakes, beaches, and nature reserves. The first ever parkrun event took place on 2 October 2004 in Bushy Park, London involving 13 runners. Today more than 3 million people across more than 2,000 locations in 22 countries participate in parkrun each week. Parkrun events are free to enter and are delivered by volunteers.