Coach Greg Marshall has nearly a decade of experience with run training and racing. He was also a standout athlete on his collegiate rowing team, and has been on two multi-day backpacking efforts totaling to over 600 miles.

Greg is a TrainingPeaks accredited coach and a UESCA Certified Ultrarunning Coach. He puts a high value on two things: understanding the whole athlete (both running and the life aspects that influence training), and backing up training with strong scientific foundations. His coaching philosophy has been heavily influenced by the work of authors like Alex Hutchinson and Christie Aschwanden as well as sports physiology researchers at Montana State University, University of Calgary, University of Colorado, and more. He truly loves the continuous education aspect of coaching and is always incorporating the newest breakthroughs into how he trains his athletes.

*TESTIMONIALS*
"Greg was great to work with and helped me qualify for the Boston Marathon in 2024. Highly recommend!!" - Brett R., Boston Marathon Qualifier

"Working with Treeline Endurance has hands-down been the best decision I've made for my training." - Will B, 100K ultra finisher

"Coach Greg is on top of everything when it comes to training, he was able to answer any question I had and addressed many things that I didn't think of when it came to training and marathon race preparation." - Rick C., 6x marathon finisher