UNC alum Tim Durbin completes 7 marathons in 7 days on 7 continents Posted Jan 23, 2015 A San Francisco man has completed his mission of running seven marathons in seven days on seven continents. Tim Durbin was the only American competing in the World Marathon Challenge that started last Saturday and ended in Sydney on Friday. Along the way, he raised money for the V Foundation for cancer research. (WRAL Sports Fan)