Hal Koerner
Hal Koerner has written at least 1 book. Their most popular book is Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond with 3 saves with an average rating of 4⭐.
Hal Koerner has written at least 1 book. Their most popular book is Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond with 3 saves with an average rating of 4⭐.
