Ultramarathon doesn 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 Ultrarunning," a comprehensive handbook to running 30 to 100 miles and beyond, written by one of the most experienced and recognized athletes in the sport.

Hal Koerner is among America s best ultrarunners with podium results in more than 90 ultramarathons. In his smart, down-to-earth handbook, Koerner shares hard-earned wisdom, field-tested habits, and insider tips to help you prepare for your ultra.

You ll find guidance on exactly...