[youtube ]https://www.youtube.com/watch?v=BPAhZ6mTNrk&feature=youtu.be[/youtube]

Hailing from Scottsdale, Arizona, Sierra Blair-Coyle has been competing as a professional rock climber since the age of 14—there is no boulder or cliff she can't conquer.

For BAZAAR.com's 2016 #WomenWhoDare Issue, we traveled to Arizona to meet the climbing extraordinaire. On a free climbing expedition, she reveals what makes her fearless—and how she finds the strength to scale a wall.