I don't think I will ever be able to run 20 km, maybe that's why I admire those people who made it today at the "20K de Brussels". The first 20k race was held in Brussels on 8th June, 1980, when 4659 runners started. Today, on the 34th annual Brussels 20K, there were 6 waves of 5,000 runners. Each participant has 4 hours to complete the race. The start was given from the Parc du Cinquantenaire.