- Satchin Panda
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















