Most participants in a 5 km run (multi-location)

Most participants in a 5 km run (multi-location)
Who
Cancer Research UK
What
101246 people
Where
United Kingdom (London)
When

The largest simultaneous 5 km run was set by Cancer Research UK at the Race For Life One Big Day event and involved 101,246 participants at 23 locations across the UK, on 4 June 2006.