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

Hal Koerner's Field Guide to Ultrarunning Paperback. 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 comprehensiv.

David Lama poses for a portrait on December 1st 2013

David Lama poses for a portrait on December 2013

MTB Rider by Steve Wyper on 500px

Portrait of MTB rider Grant Ferguson. Shot taken on location at Glentress, Scotland.