Meet the Mammoths; Ethan Herrera!

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Meet the Mammoths — Ethan Herrera: Round Two on a Course That Humbled Him

Today's guest was one of roughly ninety people who finished the inaugural Mammoth 200 back in September 2025 — before any of us knew what this course actually demanded. He's kept racing well since, including a strong second-place finish at the Siskiyou Out and Back 100 this past July. And now he's back for round two.

Ethan Herrera joins us to talk honestly about a race that didn't go how he wanted: a rolled ankle early, asthma issues he fell behind on, hallucinations worse than he'd ever had, and the feeling of just getting worse and worse as the miles went on. He calls it "a special kind of bad" — and then explains why he took it as a lesson from the mountains rather than a failure, and what he's doing differently this year.

We also get into the descent off Mammoth Mountain that blew up his legs in the first ten miles, why Obsidian Dome's grapefruit-sized rocks make for such a strange contrast with the course's buttery singletrack, his advice for first-timers (the race doesn't really start until the second half), and a genuinely great moment at mile 130 when a massive herd of sheep — and one very watchful sheepdog — stopped him in his tracks and reset his whole race.

Plus: Ethan's background at the Speed Project, his path from climbing the Eastern Sierra to running through it, his work with Roark, and a confident promise to boldly miss a three-pointer if we put a hoop in front of him.

In this episode:

Mammoth 200 kicks off Friday, October 2nd in Mammoth Lakes, California. Catch live coverage on the Mountain Outpost YouTube channel, and follow @Mammoth200 for updates and tracking throughout the race.