Hal Koerner's Field Guide to Ultrarunning

Hal Koerner’s Advice for Dealing with Mud, Ice, Snow, and Cold

Hal Koerner has SEEN IT ALL. Here he gives you his advice on dealing with tough conditions while trail running or running an ultramarathon.

Some of us live in cities or flat areas that are less than ideal for training for hilly or mountainous trail races. What should we do about it?

One of America’s top ultrarunners shares his top 10 good habits for race day.

Hal Koerner lays out the basic steps you need to know to prepare for your first 50K to 100-mile ultramarathon.