Does Alex Honnold really feel no fear — and what does his fMRI brain scan actually prove?
Alex Honnold flatly rejects the popular claim that he does not experience fear. The fMRI scan that sparked the narrative showed him black-and-white photographs while he lay physically safe inside a sealed metal tube — conditions that, he argues, guarantee a muted amygdala response after 20 years of real-world climbing. The genuine takeaway from the scan, Honnold insists, is that his amygdala is intact and fully functional: fear has been conditioned away through repetition, not surgically removed from his brain.
The logic Honnold applies is straightforward. By the time scientists put him in a scanner, he had already spent decades getting genuinely scared on rock — having completed his first major free solo on Half Dome in 2008 above a 1,700-to-1,800-foot drop, and going on to climb El Capitan approximately 60 times by different routes before free soloing it. After that volume of real exposure, static black-and-white images simply lose their edge. He draws a direct parallel to a monk whose brain also scans differently after years of meditation: the changed reading reflects deep conditioning, not an absent circuit.
"There's no hack. You just get really freaking scared over and over for so long. And eventually it's not that scary anymore. But that's a very enduring way to overcome your fear."
— Alex Honnold, The Diary Of A CEO with Steven BartlettThat framing matters beyond climbing. What Honnold describes is a deliberate, years-long process of exposure that rewires the fear response from the inside — not a personality quirk or a neurological anomaly. He spent roughly three months per year in Yosemite across nine years before the Free Solo documentary was even filmed, accumulating the kind of conditioned calm the scan later detected. You can explore the full conversation on Listenly's page for The Diary Of A CEO.
About Alex Honnold
Alex Honnold is the professional rock climber best known for completing the first free solo ascent of El Capitan in Yosemite — a feat documented in the Oscar-winning Netflix film Free Solo. He has been climbing five days a week for 30 years, and by the time he completed his historic solo, he had already ascended El Capitan approximately 60 times via different routes, accumulating an unmatched breadth of familiarity with the wall. His first major free solo — Half Dome in 2008, above a 1,700-to-1,800-foot drop at the crux ledge — marked the beginning of a decade-long progression through Yosemite that the documentary's two years of filming captured only in part. Honnold's early career was funded by an initial North Face sponsorship of around $10,000 per year while he lived in his van, a period that underscores the depth of commitment behind what the fMRI scan later measured. His authority on the neuroscience of fear is not theoretical: it is built on three decades of deliberately entering, and then systematically habituating to, life-threatening exposure.
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Honnold spent roughly nine years going to Yosemite before the Free Solo documentary was filmed, spending around three months a year climbing walls. Over that period he built an accumulated familiarity with El Capitan through approximately 60 ascents via different routes before completing the free solo.
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