Marathons have become too possible for some runners. What was after the pinnacle of accomplishment within a runner’s life is currently a stepping rock for extraordinary experience in ultramarathoning. The number of ultrarunners-those running ranges of 50k (31 kilometers), 50 miles, 100k (62 kilometers), or 100 miles-is developing astronomically each year.

Dean Karnazes’s Ultramarathon Guy and Chris McDougall’s Born to Run have inspired tens of thousands to try these seemingly superhuman distances. But to time, there’s been no practical guide to ultramarathoning. Today, Bryon Powell provides written Relentless Forward Progress, the 1st how-to manual for aspiring ultrarunners. Powell covers every aspect of training for and racing ultra ranges. This encyclopedic quantity prepares runners for going farther than they possess ever eliminated before and, in the process, shows them they are with the capacity of the ‘impossible.’