If he does complete a marathon in four hours Sunday, it would be a remarkable achievement.

To qualify for an ultra race, runners must have completed a full marathon in under three hours 30 minutes.

By 2009, an estimated 467,000 runners completed a marathon within the United States.

Strategies for completing a marathon include running the whole distance and a run-walk strategy.

His first training goal was to complete a marathon in 2 hours 40 minutes.

I never would've been able to complete a marathon without this newfound awareness.

In 2004, she completed a marathon in under five hours and wanted to include a picture by her editor's letter.

Last week, we made you feel lazy with the story of a woman who completed a marathon, then gave birth to a baby.

The heaviest person to ever complete a marathon weighed 275 pounds.

By the end I feel as if I have completed a marathon.