From running in a giraffe costume to running while hula hooping, there is a host of unconventional world records in the sport.
This time he ran eight kilometers for charity.
His final ultra marathon was in York, England.
She hadn't run her first marathon until she was 86.
It was anything but easy for the former sumo champion.
He's a sumo champion and trains every day.
One German man is setting out to raise money for a disabled boy.
The British school teacher is doing it to raise money for cancer research.
The nonagenarian marathoner was logging up to 50 miles a week of training.
The California resident broke an eight-year-old record.