Molly Hemphill training on the climbing routes at Smith Rock in Terrebonne, Oregon. (Photo by Dave Burdick) American Ninja Warrior, you’ve been warned: Molly Hemphill is coming after you again. She’s extremely fit, courageous and indomitable, a zealous rock climber eager to take on the NBC show’s rugged obstacle course that few can conquer. But…

Molly Hemphill training on the climbing routes at Smith Rock in Terrebonne, Oregon. (Photo by Dave Burdick) American Ninja Warrior, you’ve been warned: Molly Hemphill is coming after you again. She’s extremely fit, courageous and indomitable, a zealous rock climber eager to take on the NBC show’s rugged obstacle course that few can conquer. But…