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Running isn’t for the faint of heart — especially when it comes to the world’s longest ultra-marathons in high mountain ranges.

A documentary, “Women of the Mountain,” follows three women as they complete these long, hard races.

Director, producer and Greensboro native Rebecca Byerly is in the film and visited FOX8 on Thursday to speak with Cindy Farmer.

For more information about “Women of the Mountain,” visit To donate to their Kickstarter, click here.