Islamabad (Pakistan) - "Margalla Backyard Ultra". The backyard is the brainchild of Lazarus Lake, the race director of Barkley Marathons. Backyard ultra is a form of ultra-marathon race where competitors must consecutively run laps with a distance of 6.706km or exactly 6706 meters (4.167 miles) in less than one hour. When each lap is completed, the remaining time within the hour is typically used to recover for the next hour’s lap, which starts at the top of the hour. Runners continue to run laps till there is only one runner left. S/he is declared the finisher/winner once s/he runs the last lap, within the hour. www.margallatrailrunners.com/margallabackyardultra