What Is an Ultramarathon?

What It's Like to Run an Ultramarathon: The Stages of Suffering

The story of Hong Kong's first ultra-marathon runners – 'so many people just thought we were mad

What is an ultramarathon, how far and on what terrain?

Ultramarathons 101

Ultramarathon Training Tips for Beginners

Training plan for an ultramarathon

10 Things That Happen to Your Body During an Ultramarathon - Listverse

I ran an ultramarathon in the hottest place on Earth

An ultramarathon ends in tragedy: runners describe horror of Gansu

The History of Ultra Races

Ultramarathons 101