
Coach Greg
Education and Experience
Coaching Philosophy
Growth first. It's not about where we started, but how far we can go.
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Growth looks different for everyone. For some of us, it's competing for a top spot in our next ultramarathon. For others, it's just understanding how to balance a diet and exercise routine for the first time in our lives. One is not better than the other.
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If you're ready to invest time and energy in yourself, then we're a match. I've more than a decade of experience in distance running and graduate-level education in exercise physiology. I help athletes who want to train with confidence that what they're doing will get them to their goals, rather than spend time developing their own training strategy.
-Greg
Credentials
Greg Marshall is the Head Coach and Founder of Treeline Endurance, bringing a rare combination of academic training and applied endurance coaching experience. He is a college-level instructor of Human Anatomy and Physiology with graduate education in Exercise and Nutrition Sciences, alongside graduate work in exercise physiology and footwear technology research. His coaching approach is further informed by extensive on-site pacing and crewing experience at premier ultra-distance events, complemented by multiple industry-recognized coaching and nutrition certifications. This background ensures athletes receive training that is scientifically grounded, practically tested, and tailored to the real demands of long-distance performance.

Media and Writing
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Coach to Senior Editor at the Believe in the Run
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Brief feature in the film From Broken to Breaking: The Colorado Trail FKT
Additional Background
2011-2014
Degree
University Name
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College faculty instructor of Human Anatomy and Physiology
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Graduate education in Exercise and Nutrition Sciences
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On-site pacing and crewing for athletes during long distance events, including:
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Other trail and road running events
Education
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Graduate work in exercise physiology
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Research work on footwear technology
Certifications


Running

Ultrarunning


Nutrition
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