The Trailhead

Pavel Cenkl is a climate writer, ultrarunner, and Dean of Academics at Prescott College who has run hundreds of miles across Iceland, Scandinavia, and the Arctic through his project Climate Run. He grew up in the White Mountains, worked the AMC huts, started one of the first collegiate trail running teams in the U.S., and built a master's program combining movement, environmental philosophy, and ecology.
 In this conversation, Zoë and Brendan talk with Pavel about what happens when you push yourself to the edge of exhaustion in landscapes that are literally shifting beneath your feet — disappearing glaciers, the vulnerability of being utterly alone in midnight sun, why "resilience over resistance" is a better framework for running and life, and the moment he screamed so loud on day three of his Iceland crossing that he scared a goose into flight and accidentally had a paradigm shift.
This episode is brought to you by Precision Fuel and Hydration, use code TRAILHEAD26 for 15% off at PrecisionHydration.com.
Our featured race is the White Lake Ultras on May 2nd in Tamworth, New Hampshire, a two-mile lakefront loop where you pick your poison: 6, 12, or 24 hours. Costumes encouraged. Register at UltraSignup.com.
The Trailhead is part of the UltraSignup Podcast Network.

Christie Aschwanden is a New York Times bestselling author, former lead science writer at FiveThirtyEight, and one of the sharpest science journalists working today. She's also a former elite Nordic skier for Team Rossignol and a national collegiate cycling champion, so when she set out to investigate the multibillion-dollar recovery industry for her book Good to Go, she brought both a scientist's rigor and an athlete's bullshit detector.
 In this episode, Zoë and Brendan talk to Christie about why cold plunges might actually delay your recovery, how your sleep tracker could be making your sleep worse, and why the most effective recovery strategies are boring, cheap, and unsexy. They dig into the rise of the "recovery industrial complex", from Tom Brady's infrared pajamas to cryotherapy chambers that NBA teams bought just because other teams had one, and what the research actually says about inflammation, ibuprofen, HRV, and the post-workout "window" myth.
Christie also makes a compelling case for radical acceptance, situational awareness for your body, and trusting your own perceptions over your Garmin readiness score. Plus: the beer mile, knitting as recovery, and why pizza might be the most underrated performance fuel.

Brad Stulberg co-wrote Peak Performance with Steve Magness and has spent over a decade studying what excellence actually requires. He joins Zoë and Brendan to dismantle the myths of hustle culture and explain why genuine excellence isn't about optimization, it's about caring deeply about something worthwhile. We dig into "zombie burnout" (exhaustion from doing too little of what lights you up), what Brad learned from studying Courtney Dauwalter and powerlifter Layne Norton, and why chasing flow states prevents you from experiencing them. A grounded, research-backed conversation about pursuing excellence without losing yourself.
 Brad Stulberg is the author of The Way of Excellence, Master of Change, and The Practice of Groundedness. He's on faculty at the University of Michigan and hosts the podcast Excellence, actually.
 Sponsor: This episode is brought to you by LMNT—electrolytes with no sugar, no BS. Try their chocolate flavors heated up for the ultimate winter hydration hack. Get a free sample pack with any order at drinklmnt.com/ultrasignup.
 Featured Race: The Devil Makes Three 50k and 10 Miler — May 16th in Waxhaw, North Carolina. Technical singletrack, prairie grass, lake views, generous cutoffs, and a low entry fee because trail running should be accessible. Cupless race, so bring your own hydration. Registration closes May 13th at ultrasignup.com.

What happens when you strip away sleep, ego, and every external measure of success for 330 kilometers? Doug Mayer, founder of Run the Alps, former Car Talk producer, and three-time Tour de Géants finisher, has spent years trying to answer that question.
 His new graphic novel, Last of the Giants, is his best attempt yet. In this episode, Doug joins Zoë and Brendan to talk about leaving a 25-year career in radio to build a trail running tour company in Chamonix, why he kept going back to one of the world's most grueling ultramarathons, and how he translated the experience of hallucinating in a snowstorm at 3am into a visual story. He shares what he learned from interviewing neuroscientists, a Buddhist monk who specializes in suffering, and the world's leading expert on pilgrimages, all in service of understanding why we do hard things and what we bring back from them. The conversation touches on "meeting the dragon" (a Buddhist concept for the moment when your usual tools stop working), the hero's journey, why Tour de Géants feels like "the PhD of ultrarunning," and how Doug accidentally started dating someone mid-race because her prefrontal cortex was too exhausted to know better.
Links: • Last of the Giants by Doug Mayer, available at Bookshop.org, Amazon, and wherever books are sold
•Run the Alps – trail running tours in the European Alps
•Running Warehouse – gear guides and the Salomon Genesis
•Salt Lake Foothills Trail Races – May 30, 2026 (10k, half, 50k, 50 miler) More from UltraSignup Podcasts:
•The Buzz with Buzz Burrell – deep dives into ultrarunning culture and philosophy
•Between Two Pines – A trail running podcast that doesn't take itself too seriously

Pat Cade has a PhD in mathematics, coaches high school cross country in Leadville, Colorado, and has finished the Leadville 100 six times. In this conversation, he explains what years of research math taught him about endurance: small steady progress compounds, inspiration only strikes if you're showing up every day, and sometimes the breakthrough comes when you stop following the plan and just go climb the mountain because it's beautiful outside.
Pat shares how he and his wife landed in Leadville after leaving academia in New York, and how they decided to pour their energy into coaching and teaching after facing infertility. He breaks down what actually makes a good coach (hint: it's not yelling), why training at 10,000 feet requires rethinking everything you learned about recovery, and what the Leadville 100's Dream Chaser program is all about. He also attempts to explain his dissertation, including whether the universe might be shaped like a donut, in terms anyone can follow. Zoë and Brendan are mostly able to keep up.
This episode is brought to you by LMNT, the tasty electrolyte drink mix with sodium, potassium, and magnesium. Pro tip for winter: heat up their chocolate salt or chocolate caramel flavors for a hydration hack that doubles as hot cocoa. And if you missed it, the fan-favorite lemonade salt is back full time. Get a free sample pack with any order at drinklmnt.com/ultrasignup.
Featured Race: The Salt and Sulphur 420 is a 420-mile journey run from Salt Lake City to West Yellowstone, traversing the Wasatch Range, Bear Lake, Jackson Hole, the Tetons, and finishing at the doorstep of Yellowstone. This isn't a stage race—it's a test of resourcefulness and mental grit across four states, with all proceeds benefiting the Women's Center in Salt Lake City. Registration closes February 1st. Learn more and sign up at ultrasignup.com/register.aspx?did=118718.