San Francisco man completes 7 marathons on 7 continents

SAN FRANCISCO (KGO) -- A San Francisco man has completed seven marathons in seven days on seven continents.

Thirty-one-year-old Tim Durbin Tweeted "And done!" after finishing the 26.2-mile race in Sydney on Friday.

He was the only American who competed in the World Marathon Challenge that also included races in Antarctica, Chile, Miami, Madrid, Morocco and Dubai.

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Durbin averaged about 5 hours for each of the marathons. But he completed the race in Sydney in less than 5 hours.

Durbin spent roughly $37,000 to participate with 11 others, who are from Brazil, India, Great Britain, Hong Kong, France, Finland and Australia.

The challenge was part of a bigger project that Durbin started In 2013 when he began logging his miles for walking, running, cross country skiing and swimming in order to complete the distance around the equator - 24,901 miles before 2022.

He's doing it all for a good cause -- raising money for the V Foundation for cancer research.