Five of the biggest and fastest half marathon events have joined forces to create a half marathon series.
SuperHalfs brings together the half marathon events in Lisbon, Prague, Copenhagen, Cardiff and Valencia.
Over 100,000 runners compete in these five races each year. All courses are extremely flat and ideal for personal best times. Even world records have been run in some of the cities.
How the SuperHalfs work
How the series works: After participating in a run, athletes receive a SuperPassport. The goal is to complete the passport within 36 months. That means within three years, athletes have time to complete all five half marathons. If they manage to do that, they can officially call themselves a "SuperRunner."