DENVER — Rock climber Alex Honnold meticulously chalked his hands before pulling himself up to the thin ledge inside the climate-controlled climbing gym. He dangled by his finger tips for a bit and then fell back to the bouncy mat. Nice and safe. No heart-pounding fear of a 3,000-foot drop, either. In the aftermath of the Academy Award-winning documentary “Free Solo,” Honnold is trying to get a grip on his sudden fame (he’s recognized everywhere), his image (he’s not really that aloof) and most of all what exactly he does next to top that spine-tingling feat. His realization: Maybe his 2017 ropeless climb of El Capitan in Yosemite National Park that’s chronicled in the film just might be the summit of his career.