By: Hal Koerner, Adam W. Chase, Scott Jurek, Josh Bloomberg

Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon from 50K to 100 Miles and Beyond

Ultramarathon doesn’t leave much room for mistakes. Don’t learn the hard way, get a jump on training for ultramarathon with Hal Koerner’s Field Guide to Ultrarunning, a comprehensive guide to running 30 to 100 miles and beyond.

Hal Koerner is America’s top ultrarunner with podium

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Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon from 50K to 100 Miles and Beyond
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