13-year-old girl from Las Vegas takes on brutal marathon for charity

An 8th grader from Las Vegas is preparing to run one of the most brutal marathons in the country - and she's doing it for a good cause.

Olive Cecchi plans on running the Leadville Marathon in Leadville, Colorado on June 16. The race starts at an elevation over 10,000 feet and gains 6,333 vertical feet over 26.2 miles.

The air is thinner at high elevations, which means that the human body needs to work harder to get the oxygen it needs to function the way it does at sea level. grueling 

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