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The first of a series of cryptic messages

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Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond Dawn Lanuza The first of a seriesHal Koerner's Field Guide to Ultrarunning offers practical training advice for ultramarathons from 50K to 100 miles and beyond. Written by renowned ultrarunner Hal Koerner, the guide shares practical insights, field tested habits, and race prep strategies to help runners prepare for long distance events. The book covers training plans, pacing, nutrition, gear, and the mental aspects of ultrarunning.