Today, many climbers ascend Yosemite’s famous Half Dome in just a few hours. But how would they fare all alone with no partner, no rope and just a thousand feet of air between them and the ground? Meet Alex Honnold. He’s 23, tall, unassuming and kind of goofy. He’s also a calm, collected super-athlete who is pioneering new territory by free soloing big walls. Alone on the Wall, one of Sender Films’ First Ascent series, follows Alex as he completes two ground-breaking projects: free soloing Zion’s Moonlight Buttress and Yosemite’s Half Dome. In the world of climbing, free soloing is rare, and in the world of free soloing, nobody else attempts such big walls. His climbing is exceptional, but it’s his composure, focus and utter calm that make such an impression.