The free, weekly, 5k timed running and walking events known as parkrun are now a global phenomenon, operating in 23 countries worldwide. Within the community of participants are enthusiasts who have created a parkrun sub-culture of challenges, loved especially by those who can no longer improve on t...

The free, weekly, 5k timed running and walking events known as parkrun are now a global phenomenon, operating in 23 countries worldwide. Within the community of participants are enthusiasts who have created a parkrun sub-culture of challenges, loved especially by those who can no longer improve on their personal best time week by week.