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An ultra-marathon is any race longer than the classic marathon distance of 26.2 miles.

Mimi's story starts back in 2001 with the Marathon des Sables, an iconic 150 mile multi-day self-sufficiency staged race in the Sahara where she raced as part of a team of three.

Mimi said: "You are constantly pushing your body and mind to see if you can do it."

Her next run is going to be 3000km across America next year from Los Angeles to New york City.

This clip is originally from The Ultra Way Friday 1st January 2016.