Are you ready to take on the ’happiest 5k on the planet’? Forget about personal bests here. Combining sport, music and splashes of vibrant hues, it doesn’t matter in the least how fast you complete The Colour Run. You’re just supposed to have a good time doing it. At every kilometre, thousands of participants will be stained from head to toe with a rainbow of coloured powders. The run’s main sponsor is Barcelona-based clothing giant Desigual. The starting gun will go off at 9am on Avinguda Rius i Taulet (Fonts de Montjuic), with runners leaving in groups every five minutes until 10.30am. So, if you like your runs to be fun this one could well be for you.