From award-winning documentary filmmaker E. Chai Vasarhelyi (“MERU”) and world-renowned photographer and mountaineer Jimmy Chin comes National Geographic Documentary Film’s FREE SOLO, a stunning, intimate and unflinching portrait of the free soloist climber Alex Honnold, as he prepares to achieve his lifelong dream: climbing the face of the world’s most famous rock ... the 3,000ft El Capitan in Yosemite National Park ... without a rope. Celebrated as one of the greatest athletic feats of any kind, Honnold’s climb set the ultimate standard: perfection or death. Succeeding in this challenge, Honnold enters his story in the annals of human achievement. FREE SOLO is both an edge-of-your seat thriller and an inspiring portrait of an athlete who exceeded our current understanding of human physical and mental potential. The result is a triumph of the human spirit. National Geographic Documentary Films taps Grammy award-winning legend Tim McGraw to perform an original song for its upcoming feature documentary FREE SOLO. From award-winning documentary filmmaker Chai Vasarhelyi and world-renowned photographer and mountaineer Jimmy Chin (“Meru”), the highly anticipated film documents “one of the greatest athletic feats of any kind ever” (The New York Times) and will be released in theaters starting on Sept. 28. McGraw Music LLC/Columbia Nashville will release McGraw’s song, Gravity, digitally later this year. Watch the video above for a sneak peek. Performed by McGraw, the song was co-written by McGraw and Grammy award-winning singer-songwriter Lori McKenna (“Humble and Kind,” “Girl Crush”), and complements the intensely intimate, personal story of climber Alex Honnold in FREE SOLO. “There are few people who pursue their passion with the fearlessness of Alex Honnold. It’s both terrifying and exhilarating to be on that journey with him when you watch FREE SOLO. Lori McKenna and I wanted the lyric of ‘Gravity’ to be a reminder that fear is a battle fought on a variety of planes, from mental to spiritual to physical. We tend to think ‘fearlessness’ is synonymous with big bold gestures, but there’s also a fragility inherent in risk—and we wanted that to come through. In the studio, Byron Gallimore and I wanted a track that sonically resonated with Marco Beltrami’s score and felt as big as El Capitan,” said McGraw.