The Trailhead by UltraSignUp

Singer-songwriter Margaret Glaspy joins Zoë and Brendan to talk about the strange and surprisingly rich overlap between running and making art. She shares how watching her mom run planted the seed early, growing up close to the Western States course, how Courtney Dauwalter and Addie Bracy helped draw her into ultrarunning, and why learning to sit with discomf...

Sam Robinson writes the Substack Footnotes, works as a content designer at YouTube, and has a PhD in seventeenth-century science, religion, and philosophy, which makes him exactly the right person to ask why we're all trying so hard to optimize a sport whose whole appeal is that it's beautifully pointless. Zoë and Bren...

Heather Hansman is an award-winning outdoor journalist, an Outside columnist, and the author of Downriver and the bestselling Powder Days. Her new book, Fierce Country: The Untold Story of Three Women Who Ignited America's Love for the Wild, is out now.

In this conversation: the t...

Adharanand Finn is an award-winning journalist and the author of Running with the Kenyans, The Way of the Runner, and The Rise of the Ultra Runners, and his forthcoming book The Running Pilgrim chronicles the 1,400 miles he ran around Ireland in 68 days.

In this conversation, Zoe and Brendan talk w...

Anastasia Wilde is a Missoula-based adventure photographer who has spent the last five years shooting the country's biggest 200-mile races like Bigfoot, Tahoe, Cocodona, and hiking up to eight miles into the backcountry with thirty pounds of gear to photograph runners at their most unfiltered.

In t...

Dillon Osleger is a geologist, professional mountain biker, and longtime trail steward whose debut book, Trail Work: Restoring the Paths and Stories of America's Public Lands, uncovers the buried history beneath the trails we run, ride, and take for granted.

In this conversation, Zoe and Brendan g...

Dr. Nick Tiller is an exercise scientist at the Lundquist Institute at Harbor-UCLA, a two-decade ultrarunner, and the author of The Skeptic's Guide to Sports Science and the new The Health and Wellness Lie.

In this conversation: why ultrarunning is, by Nick's cheerful admission, not actually good f...

Ben Ratliff is a former New York Times music critic, a writing professor at NYU, and the author of Run the Song: Writing About Running About Listening, longlisted for the National Book Award and named a finalist for the PEN/Diamonstein-Spielvogel Award for the Art of the Essay, which chronicles what he hears when he brings music into his near-daily r...

When you hit the wall at mile 19 of a marathon (or mile 80 of a 100-miler) it feels like your body is the problem. Your legs are concrete, your stomach is in revolt, and the finish line might as well be on the moon. But what if the wall is mostly in your head?

Emily Balcetis is a social psychologist who studies how vision and perception shape motivation: how what people literally see changes what they believe they can do. She runs ...

David Raichlen is a professor of biological sciences at the University of Southern California whose research examines how human evolution, physical activity, and brain health are linked across the lifespan. In this conversation, Zoë and Brendan talk with David about what's actually happening in your brain when you go from couch to consistently active, why exercise might be the closest thing we have to a dementia preventative, and w...

Rochelle Bilow is a romance novelist, food writer, French Culinary Institute graduate, former Bon Appétit editor, and current kitchen gear expert at Serious Eats, and she just came back to ultrarunning after nearly a decade away from the sport. In this conversation, Zoë and Brendan talk with Rochelle about what she learned cooking on a farm that culinary school never taught her, why she pivoted from heartbreak memoir to romance fic...

Ryan Goodman grew up on a cattle ranch in Arkansas, studied beef cattle science at Oklahoma State University, and now manages WSU's beef cattle research program as Beef Cattle Operations Manager in Pullman, Washington, where he also teaches hands-on lab courses to the next generation of pre-veterinary students. Online, he goes by @BeefRunner. He also runs a lot of 100-mile races.

In this conversation, Zoë and Brendan talk with...

C. Thi Nguyen is a philosopher at the University of Utah, a former food writer for the Los Angeles Times, a rock climber, and one of the world's leading thinkers on the philosophy of games. His new book, The Score: How to Stop Playing Somebody Else's Game, argues that games are the defining art form of our era...

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 comb...

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 de...

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

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 t...

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 com...

For the final episode of 2025, Zoë and Brendan share their own year-end reflections, summits, snacks, and slogs,  including Zoë's experience hitchhiking to the start line of a 78-mile race in Italy, arriving 90 seconds before the gun went off to stand between Kilian Jornet and Jim Walmsley in a downpour that would last 15 hours.

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