About Running on Empty: An Ultramarathoner’s Story of Love, Loss, and a Record-Setting Run Across America Hardcover: 320 pages Publisher: Avery (April 14, 2011) The ultimate endurance athlete, Marshall Ulrich has run more than 100 foot races averaging over 100  miles each, completed 12 expedition-length adventure races, and ascended the Seven Summits – including Mount […]