Dean Karnazes has been called the “Quintessential Ultramarathoner” by Outside magazine. Winner of the 2004 Badwater Marathon in Death Valley, and recipient of the ESPN ESPY Award as the “Best Outdoor Athlete” of 2006, he is the author of the New York Times bestseller Ultramarathon Man. Dean lives with his wife and two children in San Francisco. His website is http://www.ultramarathonman.com.
Matt Fitzgerald is an endurance sports writer, coach, and nutritionist. He is a coach and spokesperson for PEAR Sports and former senior editor at Triathlete and Competitor. Fitzgerald has contributed to Men’s Health, Outside, Runner’s World, Shape, and other publications. He lives in Northern California with his wife.