Ready to Run an Ultramarathon? When you consider marathons, do you think, "been there, done that"? Like so many others, do you believe that humans were born to

Ultramarathons don’t leave much room for mistakes. Don’t learn the hard way: get a jump on training for an ultramarathon with Hal Koerner’s Field Guide to

***Updated and expanded new edition*** An Updated, Interactive Guide to Take Your Running to the Next Level With 20 years of running and competing around the wo

Errata slip inserted between pages 58-59.

When elite ultrarunners have a need for speed, they turn to coach Jason Koop. Now the sport’s leading coach makes his highly effective ultramarathon training