Men's marathon begins on last day of Games

The men's marathon has started in a downpour with runners leaving from the Sambodromo stadium in central Rio.

This is the last event in the Olympic track and field program in Rio, and the Kenyans are expecting to wrap it up with gold.

Eliud Kipchoge has been the dominant marathoner the past two years, while his Kenyan teammate Stanley Biwott also is a contender.

Stephen Kiptrotich of Uganda is looking to defend the gold medal he won in the 2012 London Games. The field also features three Australians.

With the rain, only a small crowd of fans and supporters in ponchos and holding umbrellas were on hand on Sunday to see the runners off on the course winding through the soggy streets of Rio de Janeiro.