Although Dean Karnazes" Ultramarathon Man and Neal Jamison"s Running Through the Wall provide runners with engrossing narrative accounts of the experience of running beyond 26.2 miles, no practical guide has existed to help runners who want to move up to this incredible challenge. Runners will find that the training they did for 10Ks or marathons does not directly translate to running ultramarathons. It"s a completely new world. Relentless Forward Progress gives concise, step-by-step advice on all aspects of running ultras. The reader will learn ultramarathon training principles applicable from 50K to one hundred miles or more, hydration and nutrition strategies, how to choose the right gear, how to make the most of race day, and more. It covers all aspects of physical and mental preparation. Running feats that seem superhuman151;like finishing the mountainous Western States Endurance Run one hundred mile trail race151;will become accessible to any healthy person who reads this book. Bryon Powell is a former Washington, DC, attorney who left his job to devote himself to running ultramarathons full time. He writes the popular ultrarunning blog iRunFar.com and competes in ultras nationwide. His articles have been published in Running Times, Trail Runner, Competitor, and UltraRunning. He lives in Yosemite, California.