Ultrarunners take on North America

Not content with a normal marathon across 42km, the ultrarunners yearn for something bigger and more testing.

Most runners would consider finishing a marathon as an accomplishment, but for a select group 42km just isn’t enough.

They’re known as ultrarunners.

Al Jazeera’s Kristen Saloomey met up with Ireland’s Richard Donovan, who’s just run all the way across North America.

Source: Al Jazeera