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 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.

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 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.

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 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.