Several of these are held every weekend around the borough. Richmond Park and Bushy Park are the largest but they are also held at Old Deer Park and Crane Park. The same 5k courses are used each week and entry is free. All participants need to pre-register online through this site and then print off their own barcode to take to the event of their choice. This barcode will enable you to get a time for your run. All abilities are welcome and it is a great way to get running.