World Class Mass Participation Events With A Positive Social Agenda Run 4 Wales (R4W) is the events team behind some of the UK's best-loved mass participation events, delivering deliver world-class events with a positive social agenda. Discover events like the Cardiff Half Marathon, Newport Wales Marathon, Cardiff Bay 10K, Porthcawl 10K, Barry Island 10K and Dell Technologies Management Challenge. The R4W App lets you find and track multiple participants on event day, view interactive course