A Hundred Reasons to Run 100km reflects a personal journey that will strike a chord with anyone intrigued by the idea of trying an ultramarathon. You'll find plenty of inspiration, practical tips, and the key reason to run 100km—because you can. The idea for this book was born 10 days before author Margreet Dietz did a 100km race. While finalizing her physical preparations, she also wanted to ready herself mentally as best as possible. An experienced 3:07 marathoner and five-time Ironman finisher, she knew endurance athletes ponder the question, Why?, during the most challenging moments in an event. It's good to have an answer.