Zach Miller has been a household name in trail and ultrarunning since his out-of-nowhere victory at the 2013 JFK 50 Miler. Since then, the 34-year-old has raced and won some of the biggest races on the ultra calendar.

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Fans have watched Miller train on a cruise ship on which he was working, and spend years as a caretaker at Barr Camp on the popular Barr Trail on Pikes Peak in Colorado. They’ve also watched as he tackled the Ultra-Trail du Mont-Blanc (UTMB), one of the most legendary trail races in the world, which an American man has never won.

Miller is now the subject of filmmaker and trail runner Billy Yang’s latest film, Zach. Yang spent years following Miller and capturing every detail of his life for this project that is now available on YouTube.

We caught up with Yang to hear more about what went into the making of his latest project and what he learned from spending so much time with Miller.

This interview has been edited for clarity.


Runner’s World: Zach has been around the top of the sport for nearly a decade now. What made you want to tell his story?

Billy Yang: I started off a fan like everyone else. He’s an unassuming guy, as his friends from Colorado Springs, Colorado, say in the film. I was totally guilty of that. When I first met him, here’s this guy that shocked the ultrarunning community out of nowhere. There were a lot of oddballs at that point in time, but Rob Krar was crushing the competition and dominating the scene. I figured that I’d see what this guy was about.

I was doing a film at Lake Sonoma 50 miler in 2014, which ended up gaining a lot of traction. I followed four runners and this guy Zach Miller kind of spoils my film by winning the whole thing. Over that weekend, we hung out and got dinner with the Nike team. He really was this aw shucks, blue-collar guy who has this flip phone. So I wanted to know, who is this guy?

What did you discover?

Yang: Well, he’s clearly a rabbit—a pacesetter in a race. In that JFK race, everyone thought he’d go 30 or 40 miles with Rob and drop back. But Rob’s wheels came off, and he ended up winning and later signing with the Nike Trail Running team. Fast forward to 2017, here is this guy who has this Steve Prefontaine-esque mindset of racing as hard as you can and giving his best. He even has the mustache.

So, I wanted to tell a three-dimensional story around him with a focus on UTMB as his white whale.

The UTMB crown has alluded every male American that has toed the line in Chamonix, France. It seems like one of the last, to use a climbing analogy, first ascents in running. Zach has been to UTMB three times, once with you there. Were you hoping or waiting to see if Zach could get it?

Yang: I’d be wrong to say the story wasn’t centered around this big, awesome white whale that is UTMB. When I zoom out, I do think that the end we have is kind of perfect. The way the outcome is so imperfect. The finish isn’t a given. For two years, we racked this story. I don’t tell the story about the 2019 race when he dropped out. What we see is his racing style and the only thing that’s a given is how hard you decide to push. That was kind of the spirit of the film.

You mention the climbing analogy. My inspiration was actually a film called Free Solo. You can take as many stabs at it and the things you want to do is right in front of you. For Alex Honnold, that was El Capitan. He kept coming back. For Zach, that’s UTMB. Sometimes, it’s just challenging and that mark of a good story is learning how to pivot and complete the story without that Disney outcome.

I finally decided after years of working on this that we needed to wrap this up. We can’t keep chasing this victory that I saw in my head.

Zach is a well-known runner. What do you hope viewers see that they may not have before about him?

Yang: In a way, I’m hoping to introduce him to a new crowd. Zach is a runner, he what makes Zach who is is way more. He grew up in Kenya, and is parents were missionaries. Faith plays a big role in his life. Mentorship and giving back is so important to him. The mindset of ‘do the best you can’ shows in all aspects of his life and at the center of that, I wanted Zach to be a model for people. He’s probably not genetically built like Kilian Jornet or Jim Walmsley or Eliud Kipchoge. But what you see is all the hard work, the miles, and the little things he puts in. He’s so easy to root for.

At the end, we don’t totally see it, but you slightly detail where Zach is at after foot surgery. What’s he up to now?

Yang: He’s not running at the moment. He’s working on building out a short bus that’s turning into a home on wheels. He plans to travel the world in it. That’s the epilogue.

Do you think we see an American man winning UTMB in the coming years?

Yang: I think between Zach, Tim and Jim, and maybe some others no currently at the forefront, someone will do it. Zach said it’s a puzzle you have to put together and for whatever reason, that hasn’t been put together yet. I think it will happen in the next five years and I would bet money it will be one of those three.


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Andrew Dawson
Gear & News Editor

Drew covers a variety of subjects for Runner’s World and Bicycling, and he specializes in writing and editing human interest pieces while also covering health, wellness, gear, and fitness for the brand. His work has previously been published in Men’s Health.